Why did your best friend have to walk in on your drunken hookup with his other best friend? And why did he want to join in?
Well, knowing Ryusui it was to be expected.
If you were being honest, you knew this would happen eventually. Heck, deep down you wanted this to happen. It’d been a small fantasy of yours to have a threesome with him and surprisingly your filthy dreams were about to become reality.
After you and Senku were caught by the blonde, things had progressed… The moment you’d all finished talking things out, both their hands were on you, exploring and squeezing and grabbing at your clothes.
“Do you even know what to do with all that?” Ryusui smirked at Senku before pulling your back flush against his front, placing his hands on either side of your ribcage and sliding downward until he reached your pants. He popped the button and unzipped them, dexterous fingers slipping beneath your panties and finding your clit with perfect precision, rubbing in tight circles.
“Nng—!” You gasped. Then Senku grabbed the hem of your top and pulled it off, exposing your bra.
“Of course I do. We were literally hooking up before you decided to interrupt.” He hastily slipped the straps off of your shoulders, dipping his head down to nuzzle the warm skin of your neck. His tongue swiped against it, followed by a soft bite. The cups of your bra were pulled down, an intense sensation shooting through you as Senku gently pinched your nipples and rolled them around between his fingers.
Your head was swimming, more from the situation than from the drinks you had hours ago. Their scents combined was a heady aphrodisiac, designer cologne and the fragrance of leather mingled together.
Senku backed away slightly, and quite suddenly was on his knees before you. He curled his fingers into the waistband of your pants and pulled them down along with your panties over your hips, fabric pooling around your ankles.
“Hah! You should be thanking me, I know she will since I saved her from a boring fuck.” Ryusui slid his fingertips over your clit in one last circle before gliding over the slick skin, forming a V with his fingers and parting your lower lips right in front of Senku’s face. He didn’t need to be told twice, diving in hungrily. His tongue pressed between your folds, licking a trail up through them towards your clit. He licked with the flat of his tongue, not as precise as Ryusui’s fingers had been but the velvet muscle sliding over your bundle of nerves felt just as heavenly.
“Ah!” A shaky whimper escaped your lips before you realized it, causing you to grip Ryusui’s forearms and dig your nails in. He sucked a breath in through his teeth, you realized just how close to your ear he was and how uncomfortable this position was. “W-wait, pause!”
Both men backed off immediately, eyes burning into you.
“I’d rather do this on the bed.”
“Of course you do, picky girl.” Ryusui chuckled behind you, turned you by the hips to face him and picked you up, carelessly placing you on the mattress. As both of them hurry to pull their own clothes off you unclipped your bra and tossed it into the darkness, not caring at all where it landed. When you looked up Ryusui was at the side of the bed, he looked beautiful in the moonlight. Shimmering brown eyes sized you up like a well earned meal before grabbing your ankles and pulling your ass to the edge of the mattress, something hot and fleshy and hard fell against your slit, sliding back and forth in your wetness.
“Ryu, quit being a damn tease,” you groaned, grinding your hips into his, aching to be full of him.
His lips curved into his usual cocky smirk and despite your whining he continued sliding his cock through your folds, coating his pink tip with your juices. “Who else is gonna tease the hell out of you, have you squirming underneath them? It sure isn’t Senku, since he won’t last a minute near you.”
The mattress dipped behind you, and soon Senku was kneeling by your head. “Well, it’s been more than a minute and I haven’t exploded. Looks like you were wrong, ” he barked at Ryusui, a hand gently running through your hair.
“Some advice from someone who can satisfy her. It takes wayy more than a minute to make her cum, let’s see if you last that long.”
“If you could satisfy her, she wouldn’t have been hooking up with me. So what’s your point?”
“Umm, I’m right here? Please don’t start fighting over me again, it turns me on and I’d rather cum from some action rather than petty words.” You sighed, finding their arguing arousing, who wouldn’t want two guys fighting over them?
“Then we’ll stop, can’t have you melting yet!” Ryusui laughed, winking at you making you roll your eyes.
Then you looked up, instantly captivated by the stiff cock standing before your eyes. It’s a good size, with a delicious curve to it, not as long or as girthy as Ryusui’s but it still looked tasty. Who knew the nerd would be packing? “Yum,” you licked your lips, fuck now Senku knew how lustful you really are.
Seeing how your tongue darted out of your lips so sensually, a thick blush spread across the scientists face as he imagined how those lips would feel around him. “P-please—”
“Since you’re begging… Don’t mind if I do,” you reached to take him in your hand, relishing the sigh he gives you when you squeeze it gently.
“Focus on me, or I’ll make you.”
That’s the only warning you got before Ryusui rocked his hips back and slammed them forward, filling you in one efficient motion. You yelped in surprise, a sound one step down from a shriek. You were wet enough that the sudden intrusion didn’t hurt. The cocky laugh you heard after was completely ignored. The only thing you could focus on was the stretch and pressure of him already fucking you steadily, and the feeling of his hands grabbing your hips in order to pull you back every time his thrusts push you away.
“Oh shit,” you gasped, trying your best to get your head back in the game so you could appreciate the cock in your hand. As soon as the initial shock of pleasure eased, you looked back up at Senku, who looked from the scene at the edge of the bed back to your face.
He groaned at how perfect your hand looked wrapped around his cock, and traced the shape of your jaw until his thumb settled on your chin. He applied tender pressure, and you took the hint and opened your mouth, licking up the underside of his cock. A generous dribble of precum had leaked from his tip, you lapped it up with your tongue before taking the head into your mouth. Senku groaned your name, fought the urge to shove his hips forward and fuck your pretty mouth.
Your body being jostled and the feeling of Ryusui’s cock pushing and dragging on your walls made it difficult to truly suck on Senku, so you settled for short bobs of your head peppered in with kisses and licks to the tip.
“Don’t get too worked up,” Ryusui huffed as he addressed Senku, “or you’ll just disappoint her.”
“Are you seriously telling me how to fuck her, is she your girl or something?”
“Are.. you.. my.. girl?” Ryusui panted, thrusting into your gummy walls with every single word.
“Fuck no- fuuuckk, please shut up!” You mewled and squeezed around him making him hiss at the sudden tightness.
Senku chuckled at this before his breath got caught in his throat from the sensation of you stroking him at a faster pace. “Looks like she’s not yours.”
“I know that, she’s not anyone’s. It’s like…” Ryusui steadied his pace, “like this whole thing. We’re not really into monogamy.”
“Now your whole freaky friendship makes sense,” Senku stammered, then suddenly your hands were off him and you let out a frustrated sigh.
“Oh my days, just shut up and kiss already,” this was the weirdest way for Senku to find out about the situation between you and Ryusui.
Both men looked at you, stunned, and then looked at each other. You heard a frustrated growl, but you weren’t sure which of them it actually came from, probably Ryusui since the greedy fuck wanted Senku just as much as you did.
It happened quickly, Ryusui grabbing the other man by his hair and both of them leaning in to mash their lips together in an angry kiss that was more teeth than tongue. Despite everything, he never stopped pounding into you, and between the sensation and the erotic display above you… it all had you drooling.
The kiss broke, and they both focused their energy back on you. Senku had adjusted to lay beside you, groping your chest and teasing your nipples all while kissing and nibbling just beneath your ear. Ryusui adjusted his grip, pushing on the backs of your knees and fucking you with feral ferocity.
Senku changed his tactics, hand dragging down your belly to play with your clit. The scientist knew a lot about anatomy and was gonna show you just how well versed he was on the subject. He kissed across your jaw, towards your mouth, and ran his tongue over your lower lip. On instinct, you opened your mouth and let him lick inside, and suddenly every tiny noise you made was loud and clear.
“That’s it,” Ryusui hissed, “we want to hear you.”
Your core began trembling, being their center of attention was quickly becoming too much. You whimpered, managing to speak through the kiss. “M’really close, please!”
At that, Senku worked your nerves harder, stirring spirals of delirious pressure over your slickened flesh. The thread of your willpower broke, orgasm coming onto you as a slow but every intensifying burn. “Nng, I’m coming- ah!”
Ryusui’s hips snapped against you and you cried out, soft and raspy at first but becoming louder with every spasm of your pleasure. A short squealing scream burst from you at the height of it all, earning a triumphant but labored laugh from the man fucking you. Just as it died down, Ryusui quickly let go of one of your legs and pulled out, jerking his cock only a few times before spilling himself over your stomach in ropes and droplets.
There was a brief pause, where the only sound was your mingled labored breathing.
“Your turn, Senku.” Ryusui slipped his hands beneath your ass and lifted, pushing you further towards the center of the bed.
Senku dipped his head down to kiss you briefly before sitting back on his thighs, adjusting you until you were settled in front of him on your knees with your ass in the air. The cum on your abdomen rolled upward, dripped down onto the sheets. Your head was turned to the side with your cheek pressed against the mattress.
The spongy head of his cock caught on your opening. His voice was raspy when he said your name in a low tone. “Are you ready?”
Still a bit dazed from your orgasm, you nodded. “Mhm.”
He pushed his way inside of you. Slower than Ryusui had, but brusquely enough that you yelped involuntarily. In seconds he was deep inside you, balls nestled against your cunt. Senku groaned, savored the moment, and promptly began thrusting into you.
Immediately you were clawing at the sheets. Your fucked-out pussy was still pulsating from your orgasm, hyper-sensitive and every single nerve ending sung out in your head. Your pleasure had been tapering off, but with Senku’s shaft rubbing insistently on your front wall it was quickly building back up again. Your mouth hung open, and every thrust pushed a breathy whine out of you.
The mattress dipped again and you felt your hair being tucked behind your ear. You looked up at Ryusui above you, but you weren’t quite able to focus.
“Pull her up to your chest.”
There was a moment of hesitation, but Senku leaned down and crossed his arms under your ribs and pulled. The motion lifted your upper body, arched your back as he kept up the pace of penetrating you. Ryusui sat before you, so you reached out to steady yourself with his shoulders. He spoke in a sultry tone.
“Look at you, having one right after the other. I hope we haven’t tired you out.”
You moaned and swallowed before shaking your head. “Nah, I’m good.” Senku fucked you harder. “Ah! So good, both of you feel so fucking good.”
Ryusui hummed, long arm reaching beneath you. Once again, your bundle of nerves was treated with skill. He leaned forward and licked into your mouth, the tip of his tongue tracing around the edge of yours before flicking over the roof of your mouth. You sobbed with pleasure into the kiss and held on for dear life as the duo rubbed and fucked you without remorse.
The overstimulation was nearly too much, bouncing back on Senku’s cock while Ryusui’s adept fingers pushed and pulled and rubbed on your poor little clit perfectly. One of Senku’s hands wandered from your ribcage upward, and as soon as he pinched your nipple you broke. The second orgasm hit you with ruthless force, you shrieked with the intense burst of feeling. It was short, followed by your ravaged moaning as you clenched down hard on his length. The silky heat squeezing Senku’s cock pushed him dangerously close to cumming inside, but he did his best to hold out as you threw yourself back on him to get the most stimulation you possibly could.
The very moment your inner twitching stopped he ripped himself out of you, cumming hot on your delicate thighs as he drug his dick through them.
Senku panted, and they both held you securely in place long enough for both you and him to regain your senses.
It occurred to you then exactly how much of a mess you were. Semen adorned your body from your navel all the way down between your thighs. Slowly you sunk from their grip to sit on the sheets, and rubbed a hand over your fucked out face.
“I’m so damn sticky.”
“Looks like you love it,” Senku smirked.
Ryusui leaned closer to you with a dark grin, “this was amazing, who wouldn’t love it? Also, how was our first threesome?”
“Perfect,” you smiled before giving him a peck, “been wanting to do this for a while, but I didn’t think it’d be this messy.”
“If someone were to walk in on us, I’d say it’s a sticky situation,” Ryusui’s cheesy joke earned a loud snort from you and a playful eye roll from Senku.
A sticky situation it was, but it was the best situation to be in too. For all of you.
♟️a/n
07/12/25
2500 words
@smiskisworld/-fischll/fischll
-umm soo hi..?
-sorry for the 2 month break trust me idk how it was as long as that, never intended to take a break that long BUT IT WAS SOOO WORTH IT FOR THE FREAK SHIT IN THIS LIKE WOAHH(wrote this fueled by a new vape and pepsi yum)
-whenever I don’t write im either going insane or having the best time ever this time it was both lol I got sick at the end of October after the best day EVER when I saw katseye the high from that got me through november then I lost all my drafts like my tsukasa one and the first version of sticky even my beloved ff greedy so I’ve just been rewriting that
-ty to everyone checking up on me i honestly don’t know where the time went but im so excited to go back to regularly writing on here tumblr is honestly one of the best apps in existence
-these author notes are kind of a diary to my future self for me I’ve been writing for years and I love seeing my old author notes from when I was like 13 so I wanna do that again so one weird thing that’s happened to me recently is I became someone’s oc on wattpad like my face is someone’s reader insert lol I’ve always done that with pics from pinterest just didn’t realise it’d happen to me lol so from now on I’ll be oversharing more on my author notes for my sanity lol👅
“Oh, they wanna tie me down that bondage just might break
I can't sign the dotted line
Just how long is forever? (It's too long, ah-hoo)
Darling, I keep (keep falling in love)”
week 3: bondage+69, senku x reader
THE DAY HAD BEEN PERFECT—well, as perfect as it could get in the Stone World. The Kingdom of Science went all out for your birthday. Food, drinks, music, and even fireworks courtesy of Senku’s genius. By the time you both finally stumbled back to your room, you were exhausted, happy, and more than ready to collapse into bed.
But waiting in the middle of your room was a box.
Senku blinked, scratching the back of his neck. “The hell? Did we invent Amazon while I wasn’t looking?”
You picked up the note card taped to the top, reading aloud: “Have an exciting birthday night! ~Gen :D”
Your eyes flicked to Senku. He was frowning, but there was a hint of amusement tugging at his mouth. “That bastard…”
You both pried open the box—and froze.
Inside was… an entire set. Ropes, cuffs, blindfolds, silk ribbon, even a feather or two. Your face heated instantly. Senku just stared, lips parting in genuine shock for once.
Then the two of you looked at each other and burst out laughing, why did your best friend have to be such a pervert?
“Well,” you said slowly, fingers brushing over the ropes, “that’s… an idea.”
Senku snorted. “Tch. Gen, that freak. Leave it to him to use your birthday to project his weird fantasies onto you.”
But the image hit you suddenly—Senku, sprawled across your bed, wrists tied neatly with crimson ribbon, looking up at you with that stubborn smirk faltering into need. You bit your lip, heat pooling low in your stomach.
Senku noticed instantly. His eyes narrowed. “Oi. Don’t look at me like that.”
You grinned. “What if I want to try it? What if I want you tied up, just once?”
His flush was instant, painting high on his cheekbones. “…The hell kind of birthday gift is that for you?”
You stepped closer, tugging at his shirt collar playfully. “The kind where I get to unwrap you.”
He groaned, dragging a hand down his face. “Shit. You’re not gonna let this go, are you?”
A few minutes of whispered coaxing (and maybe a little kissing along his neck) and Senku finally gave in, muttering, “This is just a science experiment, yes.”
⸻
He sat on the bed, shirt already discarded, glaring halfheartedly as you looped the silk rope around his wrists. His long fingers twitched but he didn’t resist. In fact, the sharp inhale he made when you cinched the knot said a lot.
“You good?” you asked softly, brushing your thumb across his knuckles.
He rolled his eyes, but his voice came out lower, rougher. “Yeah. Keep going.”
The more you bound him—the handcuffs binding his wrists above his head, the ribbon across his chest, the way you spread his legs with a quick knot to the bedframe—the more his usual smug composure crumbled. By the time you straddled him, Senku looked absolutely wrecked and you hadn’t even touched him properly yet.
“Damn…” you breathed, taking in the sight. “Gen might’ve been onto something.”
He gave a shaky laugh, tugging uselessly at the restraints. “Don’t let him hear that. I’ll never live it down.”
Then you kissed him—deep, slow, until he melted against the bindings. His body arched, desperate for more, his usual snark reduced to muffled moans against your mouth. When you pulled back, Senku chased your lips, whining softly, the sound shooting straight to your core.
“Look at you,” you teased, rolling your hips against his. “You’re usually so in control… and now you’re completely at my mercy.”
His answering groan was nothing short of sinful. “Fuck. You’re enjoying this way too much.”
“Mm, maybe.” You let your hand trail down his chest, nails grazing his skin until he shivered. “But you are too.”
“Mm, maybe.” He didn’t deny it. Couldn’t. Not when his body betrayed him, blood flowing down to his hardened cock, legs straining against the ropes, eyes glazed with a mix of defiance and need.
You leaned back down to ghost your lips over his, kissing ever so gently. You pulled back when he started to lean into it, denying him and drawing another whine from his throat.
Your hands rub up and down his slight frame, trailing softly over his abs. Your hips rolled and grind against his growing erection, prompting him to lift his pelvis and beg for you.
"Looks like you’re enjoying it, didn’t I have to beg you to do this?" You cooed as his needy cock rubbed against your soaked panties. His eyes rolled back, the friction your grinding provides teasing him.
"W-well this is just a combination of adrenaline and—," his scientific rant was cut off when you grabbed the gag lying on your bed and put it over his mouth.
Every time you had sex with him he’d always treat it like a science experiment, it never bothered you since you thought it was cute—but this time you just wanted to fuck without it turning into a lecture.
"No science this time." You continued to grind against him, leaning forward once more to nip and suck at his bottom lip.
“Ph-ulease!” Senkus whined, the sound muffled by the gag.
"Quiet now," you rubbed your hands up and down his chest, dragging your nails along his skin. You enjoyed the way it rises and falls with his eager breaths. A needy moan breaks through him as his crimson orbs roll back and a growl rumbles in his throat.
You smiled coyly and pull your panties to the side. You hear a sharp inhale as Senku’s eyes widen in anticipation. Lowering your hips you lightly rub your wet slit along the head of his twitching cock. Another moan escaped him immediately and his back arched off the bed.
"Darling, be still now..." you purred.
Senku groaned and just lets his body rest into the sheets as you continue teasing him. Each time you let him inside you a little he bucked forward, just to have you pull away. You whispered in his ear, naughty words that sent his mind reeling and his heart hammering against his ribcage.
And when you finally sank down onto him, he lost it—head falling back, a loud, broken moan tearing from his throat. His hips jerked, trying to thrust up into you, but the bindings held him down. You set the pace, slow and deliberate, watching him unravel under you.
Slowly bouncing on his hardened cock, you leaned down to remove the gag so you could hear his needy voice again. “Now you can be as loud as you want— just no science.”
“Okay, no science, my darling.” He looked into your eyes, lips trembling, his warm breath hitting your face before you leaned down to suck on his neck.
Each roll of your hips had him cursing, begging, voice raw with need. “Gods—please, more—fuck, faster—”
You went back to kissing his swollen lips, swallowing his desperate sounds as you rode him harder. He tugged at the ropes until his wrists burned, but he couldn’t stop moaning into your mouth, couldn’t stop trembling beneath you as you pushed him closer and closer.
“Ah- I’m close, baby stop so I can pull out.” He cried out, tears rolling down his cheeks.
Nodding, you slid out and sat on his chest, you quickly undid his handcuffs letting his hands be free to roam your body. Then you turned around, stroking his twitching cock in your hands. You licked his dripping flushed tip before putting it in your mouth, making him let out a loud whimper at the sudden sensation. You take him deeper inside your mouth, almost gagging on it, when you feel hands squeezing your thighs.
Senku has grabbed your thighs so your heat was now rubbing against his lips. With a few quick strokes of your clit, he begins making out with your cunt. He holds you down tighter, pressing your cunt right up close to his face. His tongue laves at your sensitive bundle of nerves, twirling around it, teasing it with tiny flitting motions and then overwhelming you with a harsh suck. You keep sucking his cock, hollowing your cheeks and rhythmically rising and falling. More needy whimpers fall from both your lips.
The two of you were already close so it was only a matter of time before you’d come undone. When he finally came, it was with a strangled cry, body arching helplessly against the restraints. His whole body shakes as he shoots ropes of white into your mouth, and you swallow. You followed quickly after, your juices dripping down his chin as you moan loudly before collapsing against his chest, both of you trembling and breathless.
⸻
Later, after you’d untied him and got cleaned up, Senku buried his face in your shoulder, hair tickling your cheek.
“Happy birthday, darling,” he muttered, voice still hoarse.
You giggled, kissing the top of his head. “Best present ever.”
He groaned. “Yeah, yeah. But don’t you dare let Gen find out he was right.”
“Darling I—”
“Love you, right? Me too, happy birthday.” He smiled before gently kissing your cheek.
♟️a/n
20/10/25
2000 words
@smiskisworld/-fischll/fischll
-TYSM FOR READING MY KINKTOBER AND GIVING ME REQUESTS!!
-this is written from a request I got, I’ve never written for Senku before so I hope I did him justice!!
-sorry for the wait haha I was busy with work and life this week also might be getting back with my man this week omg will maybe be in my first real relationship by next weeks update wtf I’m growing up🥹
-tsukasa is next guys!! If I’m not busy I’ll do it before next Sunday I’ve gotten a few requests for him so I hope those waiting don’t think I’ve forgotten about him!! also pls comment and send requests so I’m motivated lol
nsfw- this has nothing to do with my ryusui fanfic greedy, just a random oneshot
The ship creaked quietly under the night sky, half-finished. You hadn't expected to be cornered against one of its wooden beams, Ryusui's body pressed flush to yours, his mouth devouring every word you might have said.
His kiss was hot, demanding, tongue sliding against yours like he owned you already. He broke away only to grin down at you, eyes burning with a hunger that was more dangerous than the sea itself.
"Do you know what it does to me, my treasure," he purred, one hand tilting your chin up, "to see you shining even in this primitive world? To know you are mine?"
You opened your mouth to retort, but his hand slipped beneath your clothes, and your breath hitched instead. His fingers trailed deliberately slow across your stomach, lower, lower, until they brushed where you needed him most. The smug tilt of his lips deepened when you shivered.
"So wet already?" he teased, voice low. "Ah, but of course—you're exquisite in every way."
Your protest came out as a gasp when he pushed your legs apart, fingers slipping against your folds, stroking lazily, deliberately, until your knees weakened. He pinned your wrist above your head with his other hand, forcing you to lean into him for support. Every movement was calculated, controlled, yet desperate in its own way—greedy.
"Look at you," he whispered against your ear, teeth grazing the lobe, "my divine treasure, trembling under my touch. Say it. Say you're mine."
When you refused, biting back the words, he chuckled darkly and dropped to his knees before you could stop him. His golden eyes glinted up at you as his hands spread your thighs apart, and then his mouth was on you—hot, hungry, unrelenting.
You cried out, the sound muffled quickly by your own hand, but Ryusui yanked it away. "No, no, my love," he said, licking you with a slow drag of his tongue. "Let the world hear how beautiful you sound."
He buried himself between your thighs, lapping at you like a man starved, tongue circling and plunging until your hips bucked against his face. He groaned into you, savoring your taste, drinking every drop of your pleasure. When you came undone, trembling and gasping his name, he licked you through it, greedy for more.
But Ryusui was never satisfied with just one taste. He rose, wiping his mouth with the back of his hand, grinning like he'd found gold. "Perfect," he said, voice husky. "But I'll need more."
He freed himself from his pants, hard and aching, pressing against your slick entrance as he leaned in to kiss you again—deep, messy, letting you taste yourself on his tongue. Then, with one slow, deliberate thrust, he filled you.
The stretch made your breath hitch, and he groaned low in his throat, burying his face against your neck. "Ahh... tight around me already. You were made for me, weren't you, my darling?"
He didn't give you time to adjust before he began moving, hips snapping forward with a rhythm that was both punishing and worshipful. Every thrust drove you higher, his hand gripping your thigh to hold you open for him as he took and took and took.
"Beautiful," he panted, pressing kisses across your throat. "Every sound, every shiver—it all belongs to me. Say it. Say you're mine."
This time, when the words tumbled from your lips, he groaned like he'd claimed the world itself. He fucked you harder, faster, chasing his release while coaxing yours again, greedy as ever. And when you broke apart beneath him a second time, he spilled into you with a shuddering moan, holding you tight as though he'd never let go.
Even afterward, when your body was trembling and spent, Ryusui's hand stroked your cheek, his smile softer but no less intense. "Exquisite," he whispered, kissing you gently now. "The greatest treasure of all is you—and I'll never stop being greedy for you."
a/n
-FINALLY MADE A SMUT couldn’t wait anymore lol
-not the best don’t worry my smut for my fic isn’t going to be this bad
-had to clear out my drafts writing is lowkey therapy I wish it could be my real job but I’m a flipping teacher
-pls lmk if u liked this mess and if u want more random oneshots with other characters too!!
-BTW TS WAS SO RANDOM I FINISHED WRITING IT AT 6AM LMAOO
• Ryusui fell for you the moment he laid eyes on you. Whether you were revived at the same time as him or later, he treated it like fate and made it his mission to sweep you off your feet.
• He’s shameless with his affection—grand declarations, over-the-top flirting, and dramatic gestures that make everyone roll their eyes (except you, though you pretend to be unimpressed).
• He absolutely adores calling you pet names—“my goddess,” “my treasure,” “beloved”—and insists on saying them in front of everyone, no matter how flustered you get.
• Banter is the foundation of your relationship. You tease him for being overdramatic and greedy, but you secretly love his fire. He loves that you don’t bend easily to his charms and can spar with him verbally.
✧ Protective / Soft Ryusui Headcanons
• If anyone ever insults you, Ryusui immediately challenges them—verbally, dramatically, or even physically if needed. He won’t tolerate anyone diminishing you.
• He notices when your mask slips—when you’re tired, overwhelmed, or insecure—and those are the rare times he drops his flamboyance to be gentle and genuine with you.
• He tells you often, so often, how much he admires not just your beauty, but your strength and brilliance. He believes wholeheartedly that you’re his equal, his partner in greed for life itself.
• Sometimes, when it’s just the two of you under the stars, his voice softens and he admits things he doesn’t tell others—fears, dreams, and how much you truly mean to him.
✧ Romantic Headcanons
• He loves kissing your hand dramatically in public, but in private, he lingers with softer kisses on your hair, your forehead, your temple.
• His idea of a date is either the most extravagant thing possible (sailing, hunting for treasure, feasts) or something surprisingly simple, like watching the sunrise together.
• He keeps mental “treasures” of you—small details you’ve shared about yourself, favorite foods, little quirks. He’ll bring them up casually, proving he listens more than people think.
• Ryusui constantly says things like, “The greatest treasure in this world is you, my darling!”—and though it sounds like one of his usual dramatic lines, you’ve learned he truly means it.
✧ General NSFW Headcanons
• Ryusui is greedy in every sense—once he has you, he wants all of you. He’s endlessly passionate and doesn’t tire easily; stamina is definitely one of his strong suits.
• He sees intimacy as an adventure—something to savor, something to conquer, and something to enjoy to the fullest.
• Praise is constant. He’ll call you “exquisite,” “divine,” “my treasure,” and make you feel like the most precious jewel in the world.
✧ In Bed with Ryusui
• He loves taking control, but not in a cruel way—more in a grand way. He’ll guide you, pin your wrists above your head, whisper filthy promises, and then lavish you with pleasure until you’re melting.
• That said, he absolutely adores when you surprise him by taking charge. It excites him, and he’ll grin through it, praising your boldness.
• He has a bit of a voyeuristic streak—he loves watching you squirm, watching your expressions, and hearing every sound you make. Your reactions are his greatest treasure.
• His aftercare is always indulgent: holding you close, stroking your hair, and murmuring sweet words about how lucky he is to have you.
✧ Kinks & Preferences
• Praise kink (giving & receiving): He’ll worship your body like it’s sacred, and he melts if you praise him back.
• Exhibitionism (light): He gets a thrill out of risky places—quietly pulling you aside during a voyage or sneaking you away under the stars.
• Oral (giving): Ryusui has zero shame in burying himself between your thighs for as long as it takes. He’s greedy, thorough, and smug about how well he can make you come undone.
• Teasing: He’ll draw things out, whispering exactly what he’s going to do to you before actually doing it. The anticipation is half the fun for him.
• Possessiveness: While not controlling, he loves leaving marks—hickeys, bites, anything that says you’re his treasure.
✧ Positions & Habits
• His favorite positions are ones where he can see your face—missionary with your legs over his shoulders, or taking you from behind with your reflection caught somewhere. He wants to watch you fall apart.
• He has a dramatic habit of kissing you deeply before and after every round, like sealing a deal.
• If you try to outlast him, good luck—his stamina is absurd. He’ll tease, “My love, the night is still young, and so are we!” and keep going until you can’t anymore.
19/08/25
a/n
-had the idea to write this at 5am after a mental breakdown bcs my vape died lmao
-lowkey rlly bad I wrote this before I made my fic as a kinda guide as to how he’d act
-will make a better one soon js wanted to feed u guys before the next few chapters
That’s the question you’d been mulling over recently. Things were finally somewhat peaceful within the Kingdom of science— no figuring out how to make revival fluid, no wars against Tsukasas army and nothing to do but work towards building the ship. So now you had nothing but time to think about more trivial things.
Things like your long term relationship with a certain scientist.
You usually had the answers to many questions, being smarter than most did that, and if you didn’t have the answer to one you’d just ask your slightly smarter boyfriend. However, if you were to ask him this one— he probably wouldn’t know the answer to it either.
Still, you couldn’t let this one go since it was driving you crazy.
Dating.
What does it even mean?
You and Senku had decided to date back at the end of middle school. No dramatic confession, no fireworks—just a mutual, quiet understanding. You liked him. He liked you. Why complicate it?
And honestly… nothing has changed since then.
You still walk everywhere together. Still sleep beside each other, backs nearly touching for warmth. Still hug—long, comfy hugs that make the world feel steady again. Sometimes you hold hands, fingers loosely linked like it’s no big deal.
It’s comfortable.
It’s safe.
It’s… childish.
Your jaw tightens. Your thoughts are so damn childish, what are you twelve?
God, get it together, you scold yourself internally. You’re thinking about stupid shit.
But now that you’re not constantly worrying about being murdered, or petrified, or starving, your brain has space for these thoughts. Too much space.
You still hadn’t kissed. Or said ‘I love you’ even when there were moments where you could tell the both of you wanted to say it to one another. Or done anything a normal couple at your age would do.
You sigh quietly, staring at the empty table in front of you, lost in thought.
“…Knock knock, anyone there?”
Gen’s voice cuts through the air, light but teasing.
You don’t react.
He blinks. “Wow. She’s gone gone.”
Still nothing.
A moment later, a finger pokes your cheek.
“Oi,” Senku says. “Stop spacing out.”
You jolt like you’ve been struck by lightning. “W–WHAT—?!”
The sudden movement makes you knock your plate over, and your frantic scrambling draws laughter from almost everyone nearby.
“Adorable,” Gen snickers.
Your face burns. “I wasn’t spacing out!”
Senku raises an eyebrow. “You totally were.”
Before you can retort back, Ryusui plops down across from you, resting his chin in his hand, eyes sharp with interest.
“So,” he says casually, “it’s cute how you only stopped spacing when Senku called out to you! Speaking of you and Senku, how’s it going?”
Instant death. Shots were fired. He called you out.
How did he know you were JUST thinking about the sad state of your relationship?
You choke on air. “H–HUH?!”
Senku sighs. “Why is that any of your business?”
Ryusui smirks. “Because you two act like a married couple and a middle school couple at the same time. Fascinating contradiction.”
Gen hums. “Now that you mention it… you are oddly awkward sometimes.”
Your hands fidget in your lap. “We’re not awkward.”
Ryusui tilts his head. “Then why do you act like strangers when romance comes up?”
Senku answers flatly, “It doesn’t matter.”
You nod quickly. “Yeah. Isn’t this how a normal couple acts?”
Ryusui laughs—loud, bright, utterly unconvinced.
“Oh, sweetheart,” he says, leaning closer. Then he lowers his voice and whispers in your ear, “I can tell the two of you haven’t even kissed yet.”
Senku remains seated, arms crossed. “What’d you say to make her freak out?”
Ryusui crouches beside him. “I told her the same thing I’m about to tell you.”
Senku glances over. “Which is?”
“You haven’t kissed her.”
“…So?”
Ryusui’s jaw drops. “So?!”
Senku shrugs. “It’ll happen eventually.”
“Eventually?!” Ryusui throws his arms into the air dramatically. “You’ve been dating for over three thousand seven hundred years! Man up and make a move while you finally have time!”
Senku clicks his tongue. “…I don’t know how.”
Ryusui freezes. Then he puffs out his chest. “Lucky for you, I’m a relationship connoisseur. You may be a genius in science but I’m a genius in dating!”
He proceeds to ramble about timing, confidence, instincts, and seizing moments when adrenaline is high and emotions are raw.
Senku listens. Annoyed, but interested (not that he would ever admit to it).
Then stands. “Shut up.”
But the words Ryusui said stick.
Later that night, you’re sitting beside Senku again—this time surrounded by paper, charcoal scribbles, and calculations.
Fuel logistics.
The ship needs enough power to cross long distances without overloading capacity. You both scribble numbers, muttering under your breath.
“If we use oil exclusively, we’ll exceed weight tolerance,” Senku mutters.
“Yeah, there’s the problem with the ships capacity,” you reply. “Hmm… what if we stagger consumption?”
He pauses. “Explain.”
You lean forward, excitement bubbling. “If we calculate fuel usage per nautical mile and store it in segmented containers, we can reduce excess storage by optimizing burn rates based on wind conditions.”
You scribble rapidly. “Look—if we assume an average wind assist of 15%, we can reduce fuel load by—”
“I got it!” you suddenly shout. “We cap fuel at this amount, reserve emergency storage here, and rely on sail propulsion for the first leg!”
Senku’s eyes light up. “That’s genius, I really wanna kiss you right nooww—!” He suddenly blurts out, slurring the ‘now’ when he realises what he just said.
“So kiss me,” you jokingly say, hanging the piece of paper on the open door of the lab. A few moments later, you realise that he didn’t take your words as lightly as you’d expected. The scientist was walking closer to you by the second and for some reason you kept on backing away, until the two of you were now outside.
You couldn’t say nor do anything— I mean who could at the sight of his beautifully flushed face glowing in the moonlight? So instead you lick your lips in anticipation, staring up at the silver moon reflected in his crimson eyes as he looks up at the sky in an attempt to keep his nerves at bay.
Then… he grabs you suddenly, exhilaration surging through him—
—and kisses you.
Right on the lips.
Your brain explodes.
It’s warm. Softer than you expected. His lips hesitate against yours, like he’s half-afraid you might pull away. You can feel his breath stutter, feel the faint pressure of his thumb tightening against your sleeve as if he’s grounding himself.
It lasts only a moment—barely enough time to register that it’s real—
Then Senku pulls back as if shocked by his own actions.
Your heart is pounding so loudly you’re sure he can hear it. Your face feels hot, your lips tingling where his were, and you’re staring at him with wide eyes, trying to process the fact that after everything—
It finally happened.
Senku’s ears are bright red. His expression is caught somewhere between disbelief and panic. “…I—”
You laugh, breathless and a little shaky, the sound bubbling out of you before you can stop it. “Took you long enough!”
That makes him freeze and he thinks to himself. How can someone be so perfect?
Before he can overthink it—before he can retreat back into logic and reason—you grab the front of his shirt, fingers curling into the fabric, and pull him back down.
This time, you kiss him.
And you do it like you’ve been holding this in for years—because you have.
His breath catches sharply, a soft sound against your mouth, and for a heartbeat he’s completely still. Then he melts into it, hands finding your waist, pulling you closer until your faces are pressed together, cheeks squishing slightly, awkward and perfect and real.
You tilt your head, instinct guiding you, and deepen the kiss. Your lips part just enough to catch his lower lip, gently tugging it between yours.
The kiss grows slower, warmer, unhurried.
There’s no rush. No panic.
Just closeness.
When you finally pull back, you’re both breathless, foreheads touching, noses brushing as you laugh softly, dazed smiles spreading across your faces.
Your lips tingle. Your chest feels too full. “I love you.”
“Y’know, I love you too. And I’m 10 billion percent sure I’ll always feel that way!” He chuckles before giving you another peck on the lips.
And suddenly, you get it.
Dating isn’t about labels. Or milestones. Or what you should have done by now.
It’s this.
♟️a/n
21/12/25
2000 words
@smiskisworld/-fischll/fischll
-TYSM FOR READING MY WORK AND GIVING ME REQUESTS!!
-this is written from a request I got, I’ve never written a Senku fluff before so I hope I did him justice!! ps: not proofread or anything yet so ignore the wording and lack of info I’ll proofread one day🥹🙏
-sorry for the wait I promise I’ll get to the rest of my requests soon I’m just busy writing my ryusui fic I’m not even updating it I’m just writing so much for it lol I do this for the love of the game
-13 year old me would be so proud of me for writing about my childhood crush like aww TYSM TO THE GOAT @anajellyc for requesting this!! You’ve been here from the start and I genuinely love how u motivate me to write ily twin
week 2: oral m+f receiving, ryusui x fem!saionji reader
THE FIRST AND ONLY THING UKYO ASKED FOR WHEN HE WAS REVIVED WAS FOR HIS SISTER, sweet and perfect Y/N. Except you weren’t so sweet, the second you’d been brought back into this world Ukyo had done everything he could to keep his sister safe. And by everything, he had taken away your ability to do the one thing in life you adored.
Archery. Everybody knew you were the first person in Japan to win an Olympic gold medal for the sport, you were a national treasure and well loved by the world. So when you were revived those in the Tsukasa empire were confused as to why your brother was the one using the bow and not you. Whenever they’d ask you’d make up silly excuses like the equipment wasn’t what you were used to. Even though it pained you to act like the sport you devoted your whole life to meant nothing, it was fun deceiving the others into thinking you were a weak girl.
Still, you were just following orders. When you were revived, Ukyo asked you to do something.
“I’m alive, holy shit,” you breathed out as the pieces of stone fell off you, “Ukyo!”
Your eyes lit up as you saw your older brother standing in front of you and so did his, but something about them made you think he regretted bringing you back. Then your eyes darted towards the people surrounding you with wide eyes, fuck. This new world wasn’t safe at all, it was the kind of place where if you said the wrong thing in front of these scary people you could end up dead.
Ukyo pulled you into a hug so tight it knocked the lights out of you, “I missed you sis!” He said loud enough for the others to hear. Then in a low voice he whispered, “no archery, Y/N.”
“Yep! Happy to see you too!” You beamed, hiding how pissed off you were that he asked you to do that. However, once you learned everything you weren’t mad at him anymore.
Ukyo only told you that because he knew that letting someone like you get noticed by Tsukasa would ultimately lead to you becoming a soldier and getting blood on your hands. You weren’t a pacifist like him, in fact you would’ve gone along with whatever Tsukasa asked since the two of you shared the same ideals. But Ukyo didn’t want that for you, he wanted you to live a normal life— as normal as life could get for someone living in the stone world.
Although now that the war was over and the man he thought he could stop worrying about was now gone for a while— there was a new problem… a different kind of problem.
A certain greedy blonde had been flirting with you ever since he was brought into the stone world. Ukyo knew that you weren’t the kind of person to be moved by stuff like that, but over the past year he saw how you’d grown closer to the sailor. You’d went from hating him, to becoming indifferent to him to being somewhat close to him.
Although Ukyo saw the change in the way you’d look at each other, he wanted nothing more than to pretend he didn’t see it. What he can’t see can’t bother him, however what he can hear could.
“Ryusui, you gotta stop complimenting me!” You laughed, hitting the blondes shoulder playfully.
“Forgive me for reminding you how perfect you are,” Ryusui smirked, his voice dipping low as he leaned closer, the faint smell of wine on his breath. “My perfect girl.”
You tried to hide your grin behind the rim of your glass, swirling the deep red liquid before taking another sip. Francois’s bar was warm tonight, filled with soft laughter, clinking glasses, and the lively chattering of the other kingdom of science members.
Your heart fluttered in your chest like it always did when he said things like that — not because it was new, but because it wasn’t. Ryusui Nanami had been chasing you since the day he’d been revived, throwing compliments at you like arrows, and you — the literal Olympic archer — had finally let one hit the mark.
It had been a week since you’d said yes. Seven days of sneaky moments, shared glances, and secret smiles.
And now, sitting beside him at the bar, his hand resting casually on your thigh, you couldn’t help but think: If Ukyo saw this, he’d lose his mind.
“Ryusui,” you whispered, trying to keep your voice light even as your cheeks warmed. “You do remember that my brother would probably end you if he knew we were—”
“Dating?” he finished for you in a low whisper, smirking like the word itself was a victory. “Oh, I’m well aware. But what’s life without a little danger, darling?”
You rolled your eyes, but your lips curved into a smile anyway. He had that effect on you — infuriating and irresistible all at once.
He reached up then, fingertips brushing a loose strand of hair away from your face. His touch lingered a second too long, thumb grazing your cheek, and you felt your breath catch.
“Ryusui…” you murmured, half warning, half plea.
And that’s when you felt it — a shift in the air.
A quiet voice, smooth as ever, but carrying that undercurrent that made your stomach drop.
“Hmm… maybe you could get your hand off my sister.”
Your blood ran cold.
Ryusui froze mid-motion, fingers still a breath away from your skin. Slowly, almost comically, his confident grin faltered as he turned his head.
Ukyo stood behind him, smiling — but it was the kind of smile that could make grown men rethink every decision they’d ever made. His tone was sweet as honey, but his hand gripped Ryusui’s wrist like a steel trap.
“Oh— Ukyo!” you squeaked, trying to sound casual, which only made it worse.
Ryusui, to his credit, didn’t panic — he laughed. “Damn,” he said through a half-grimace, testing his wrist but finding Ukyo’s hold unmoving. “You’re stronger than you look.”
Ukyo’s eyes didn’t leave him. “Marine training does that to you,” he said smoothly, still smiling as if this were a friendly chat and not a death threat.
You groaned softly, burying your face in your hands. “Oh my god…”
“Marine, huh?” Ryusui grinned despite the situation, as if impressed. “No wonder you’re so protective. But I promise you, Ukyo—” he looked up at him with that annoyingly fearless charm, “—I’d never hurt your sister.”
Ukyo’s smile didn’t waver, but his grip tightened ever so slightly. “That’s good to hear,” he said pleasantly. “Because if you did, I’d hear it. Even from miles away.”
You shot up from your stool, gently prying your brother’s hand off Ryusui’s wrist. “Okay! That’s enough testosterone for one night!” you said quickly, stepping between them. “Ukyo, I appreciate your… concern, but Ryusui’s just—”
“—Just making sure she enjoys her wine,” Ryusui interjected smoothly, giving you a wink.
Ukyo gave a soft chuckle, clearly unconvinced but willing to let it slide. “Of course you are,” he said, then leaned closer to you, lowering his voice. “We’ll talk later, Y/N.”
You nodded, feeling your heart drop to your stomach. “Yeah. Sure. Can’t wait.”
As Ukyo finally walked away, Ryusui exhaled dramatically and rubbed his wrist. “Your brother might actually kill me one day,” he muttered.
You couldn’t help but laugh, resting your hand over his. “You’re lucky he didn’t.”
He grinned, eyes gleaming mischievously. “And you’re lucky I think you’re worth the risk.”
You snorted. “That’s debatable.”
But when he leaned in and pressed a quick kiss to your temple — a small, fleeting moment of affection — you knew you wouldn’t trade it for anything.
Even if it meant facing Ukyo’s wrath later that night— because he now knew.
The night air was quiet — too quiet. The kind of stillness that made you uneasy even before you saw him.
Ukyo stood outside your small cabin, arms crossed, his usual calm expression replaced with something far sharper. His eyes, normally so soft, were narrowed; his posture, tense.
Well, fuck.
You froze mid-step, bottle of leftover wine in your hand, and gave a weak smile. “…Hey, big brother.”
“Hey,” he said, voice low but tight. “You have a minute?”
Of course he knew. He always knew.
You sighed, placing the bottle on the small wooden railing before walking over to him. “You heard.”
He arched a brow. “Ryusui didn’t exactly keep his voice down.”
You groaned, dragging a hand down your face. “Of course he didn’t.”
Ukyo took a deep breath, clearly trying to keep his composure. “Y/N… Ryusui Nanami? Really?”
You looked at him, unimpressed. “Are you seriously about to lecture me right now?”
“Yes,” he said flatly. “Because the man is literally the definition of a playboy, and you—”
“—and me?” you cut in, crossing your arms.
He paused, searching for words, his voice softening slightly. “You deserve better than someone who flirts with anything that moves.”
You sighed, leaning back against the railing. “I’ve dated people before, Ukyo. You always act like this, every single time.”
He opened his mouth to argue, but you held up a hand. “No, let me finish. I get it — you’re protective. You’ve always been protective. But right now I’m a twenty-year-old woman who knows wrong from right. I know what I’m doing.”
For a long moment, he didn’t speak. Then, with a heavy exhale, he ran a hand through his hair, the tension slowly easing out of his shoulders. “Yeah… yeah, I know.”
You tilted your head, eyes softening. “Then what’s the problem?”
He met your gaze, and suddenly, the anger faded — replaced by worry. “I just want to protect you, Y/N. That’s all I’ve ever wanted.”
You smiled faintly. “There’s nobody here I need protection from. And even if I did, I can handle myself.”
Ukyo gave a quiet laugh, half a sigh, and half a groan, dragging his palm down his face. “You have no idea how much I wish that were true,” he murmured.
You chuckled softly. “You really don’t trust me to handle myself, huh?”
“I trust you,” he said quickly, looking up again, his tone sincere. “It’s him I don’t trust.”
“That makes one of us,” you teased gently, your tone lighter now.
He gave you a long look — the kind only an older brother could — before his lips quirked into a small, reluctant smile. “You’re impossible.”
You grinned. “Runs in the family.”
He let out a real laugh this time, the sound easing the last bit of tension between you. “Fine,” he said finally, hands raised in mock surrender. “You win. Just… be careful, alright?”
You nodded, smiling up at him. “I will. Promise.”
Ukyo stepped forward and pulled you into a quick hug — the kind that said I’m still mad, but I love you anyway.
When he pulled back, he gave you a small smirk. “You know, if he hurts you...”
You laughed, shaking your head. “I don’t wanna hear about how you want to torture my boyfriend.”
As he walked away, you leaned against your doorframe, exhaling a long breath.
The warmth from his hug lingered — and even more so did the flutter in your chest when you thought of Ryusui.
Damn it… how did his strategy to make you fall for him end up working?
A soft knock came from your window just as you were settling down in bed.
You froze.
“Y/N~” came the whisper, sing–song and mischievous. “It’s just me.”
You sighed, pressing a hand over your face. “Ryusui, do you ever use doors?”
He grinned at you from the other side of the glass, hair catching the moonlight, eyes bright even in the dark. “Doors are for people without charm.”
You rolled your eyes but unlatched the window anyway. “You’re impossible.”
He swung himself inside with the ease of someone who’d done this more than once, landing lightly on the wooden floor. Then Ryusui sat beside you on the bed, the wooden frame creaking softly beneath the weight of silence. The only bright light came from the lantern near the window, throwing gold across his skin and catching in his hair.
Without warning, he leaned closer and cupped your face in his hands. His palms were warm, his touch steady. He pressed a gentle kiss to your lips — just a brush at first — before breaking away to kiss the corner of your mouth, then your cheek, then the bridge of your nose.
You giggled, the sound soft and breathless. “That tickles—Ryusui!”
“Good,” he murmured between pecks. “I love your laugh.”
Your laughter faded into a softer sound when you caught his face in your hands and kissed him back — slower, deeper, with a kind of urgency neither of you could name. It then turned into a sloppy more heated kiss, lips crashing against his, tongues moving against the other. His hands slid from your jaw to your shoulders, pulling you closer until the world beyond that room disappeared.
When you finally broke apart, both of you were breathless. His forehead rested against yours, his eyes half-lidded but still glimmering with that signature spark.
“Do you have any idea what you do to me?” he murmured, voice low and rough at the edges.
You were about to answer when he tilted your chin up and pressed another kiss to your neck — feather-light at first, then firmer, tracing the line of your pulse. You felt him smile against your skin before he dove back in to suck on random spots of your neck then collarbone leaving you squirming as he started biting on it.
“Ryusui,” you whimpered quietly.
He hummed, lips still brushing your collarbone.
You placed your hand on his chest and gently pushed him back just enough to meet his eyes. His brows rose in surprise, and you could still feel his heartbeat racing beneath your fingertips.
“Ryusui, we need to talk.”
He froze for half a second, searching your face — the playful glint in his eyes softened into something more serious.
“Talk?” he repeated, voice still husky from the closeness. “Now?”
You nodded, catching your breath. “Yeah. Now.”
For a moment, he just looked at you — like he was deciding whether to tease or listen. Then, slowly, he exhaled, his hands falling from your shoulders to your sides.
“Alright,” he said, tone gentler now. “I’m listening.”
“He knows,” you said simply.
There was a beat of silence. Then, instead of looking horrified or worried, Ryusui just laughed. Loudly.
You couldn’t help laughing too. “I know! I know!” you said between giggles. “I can’t believe we actually got away with it for a week! A week, Ryusui — with Ukyo.”
Ryusui clutched his chest dramatically, still chuckling. “A week of dating behind the back of the man with superhuman hearing. Truly, we are legends.”
You grinned, shaking your head. “Honestly, it’s kind of impressive. I thought he’d figure it out after the first day you couldn’t stop smiling.”
“Oh, please,” Ryusui said, waving a hand. “You were the one blushing every time I looked at you. You gave us away long before I did.”
You laughed again, throwing a cushion at him. “You’re insufferable.”
He caught it easily, still grinning. “And yet you said yes.”
You tilted your head, teasing, “Yeah, about that. I guess now that the secret’s out, our silly little ‘hidden romance’ is officially over.”
Ryusui leaned in closer, his smile softening but that signature glint still in his eyes. “Then that means…” He paused for effect. “…I can finally, proudly, call you mine.”
You rolled your eyes, though you couldn’t help the warmth that spread through your chest. “You really don’t know how to tone it down, do you?”
“Never,” he said, completely sincere. “Not when it comes to you.”
You sighed, smiling in spite of yourself. “Fine, yes. I’m yours, Captain Show–Off.”
He laughed softly, his expression turning almost boyish. “That’s all I needed to hear.”
You shook your head, still smiling as you leaned back on your hands. “You know, Ukyo’s going to make your life hell now.”
“Oh, absolutely,” Ryusui said cheerfully. “But if it means I get to keep you, I’ll consider it fair trade.”
You snorted. “You’re ridiculous.”
“And you love it,” he said without missing a beat.
You didn’t bother denying it — your grin said enough. “Whatever-” you managed to get out one last word before his lips crashed back onto yours.
The two of you started making out on your bed in the middle of the night like you’d usually do, however this time it didn’t seem like it’d end as just another heated make out session.
You fist his shirt in the dim lights, fumbling with the buttons of his shirt in between messy kisses. Once his muscled chest was bare, you ran a hand down it feeling his abs then stopping at his defined v line. Pulling away from his kiss, you smirked as you sat in between his thighs and began trailing kisses along him. First his chin, then his neck, then his chest, then his abs, then his abdomen and then you stopped at the waistband of his pants.
“Are you sure you wanna do this?” He asked, gently tilting your head upwards so that your eyes were now on his.
You nodded and began slipping his pants off leaving him in just boxers. “Mhm, I want to do this with you, my love.”
“Just tell me what you want…” He swallowed as you rubbed him through his boxers, not breaking eye contact the whole time. Ryusui had been waiting for this moment from the moment he met you, he’d been yearning to just be in your presence, have you touch him, have him touch you. Sure, he wanted you to be the first person experiencing pleasure but if you wanted to have him melting under your touch first— who was he to deny your desires?
You were the one person he’d give up all his desires for if it brought a smile to your face. Hell, he’d worked hard to even get to this point with you.
When he’d first met you, you were so closed off to everyone around you— only ever speaking to your brother. Ryusui had spent all of his time strategising on how to get you to fall for him— it had taken a long time, but you were finally here looking up at him with your intoxicatingly beautiful doe eyes now filled with love and lust for him instead of indifference.
“Didn’t expect to see a beauty like you in the stone world, I’m Ryusui Nanami. What’s your name?” He asked you with a proud grin. He’d found you sitting on a tree with your bow and arrow in hand near the entrance of the kingdom of science earlier when he’d first been revived and had been dying to introduce himself to you ever since. So, once he’d talked to everyone else he made his way over to you.
Narrowing your eyes at the blonde you recognised from some posts online from back in the old world, you slid down the trunk of the tree and sighed. “Didn’t ask for your name and I won’t give you mine, get lost.”
“Aww, too bad! I already know all about you, Y/N Saionji! The Nanami group sponsored the last Olympics for the Japan team.” He beamed, watching you walk away as you slung the bow over your shoulders.
This guy seemed to have no problem being so bold, and that was proved once again when he started following you around for the rest of the day trying to get you to talk to him. Eventually, it started to get annoying since you were finally able to use your bow freely because the war had ended and your brother finally gave you the green light to start doing archery again. Now this guy walks in and tries to get in the way of you and your precious bonding time with your bow.
“Can you just fuck off.” You groaned as you shot a bird out of the sky, having the arrow along with the birds body land dangerously close to his foot.
Instead of being horrified by the gore of having a a dying bird so close to him or a bloodied arrow inches away from his foot, Ryusui laughed. “Wow, what skill! I already desired you before, but the sensation I’m feeling right now got beyond that!”
“Ew… did you get off to me killing a bird?” You shuddered as you looked at the way you stepped forward to pick the bird up from his feet.
Looking at the way you bent down in front of him to pick it up, the way your shorts hiked up to show the curve of your ass cheeks made him think the most sinful thoughts a man could think. “Damnnn,” he whistled not even trying to hide the fact he was checking you out.
“You’re disgusting.” You mock gagged as you delicately removed the arrow from the bird, waving the blade around to get the blood off of it. Unfortunately, a droplet of the crimson liquid landed on your face.
Ryusui smirked as he leaned in to wipe the droplet off the corner of your lips then his eyes met yours as he sucked on his thumb in an attempt to seduce you. “Like sugar on my tongue.”
“That’s blood…” you stepped away from him like he was insane— which he was.
“So who’s my dinner you or the bird?”
“None, go catch something yourself…vampire.”
“HAHA! Wasn’t my pick up line good? Gimme some credit for trying.” He chuckled as he watched you run off with the bird in hand.
Once you thought you’d gotten away from him, you handed off the bird to Senku who thanked you and said something about using it for dinner and the feathers to make some quills. But then, you remembered that you had to confront the one who brought that insufferable man into this world.
“Senku, why’d you revive that freak?! He’s been following me around all day and get this, he caught some blood off my face and… LICKED IT. THAT FREAK USED THE BLOOD AS AN EXCUSE TO TASTE ME!” You yelled, shaking the teens shoulders in horror.
“Yeah, his personality is shitty but his skills aren’t. If you hated it as much as you say you do you would’ve shot him dead, so why didn’t you?” Senku raised an eyebrow as he saw that Ryusui was now standing behind you.
“Umm, because I’m not a psychopath!”
“If he bothers you so much get Ukyo to deal with him.”
“That’s the last thing I’ll do, I’m finally allowed to do what I want!”
“Well, now that he’s fixated on you I won’t be bothered by him anymore.”
“That’s not a good thing! That freak put his finger on my face then licked it right after! Lock him up with Hyoga and Homura, tasting people is a crime!” You spat out, until you heard a laugh from behind you.
“You tasted so sweet, I forgot I was licking blood.” A deep voice chuckled.. no… not again, not when you’d finally got away.
Senku stepped forward and placed a hand on Ryusuis shoulder. “If I were you, I’d stop before you have two people out for you.”
“Romeo and Juliet had the whole world against them, trust me I’ll be fine.” Ryusui beamed, proudly puffing out his chest like his claims meant anything.
“They weren’t fine…” Senku face palmed knowing this wasn’t going to end well.
You turned around to now face Ryusui, Senku backing away knowing the captain was going to face your wrath. “If you pull shit like this again, following me, touching me and god forbid even tasting me. I’ll put an arrow somewhere you don’t want it to be.” You glanced down at his crotch before shoving a finger in his chest as a warning.
“I don’t think that’ll happen. One day, you’ll be begging for me, begging to touch me and taste me.” He whispered into your ear before walking off, finally leaving you alone but he knew he’d be back to tease you some more.
Back then you didn’t know, you’d be playing right into his hands.
“I want to taste you, Ryusui,” you smiled, tugging his boxers down just enough for his cock to spring free, thick and flushed, the mushroom tip already leaking with pre cum.
Arching your back as you leaned in, you licked a slow stripe along his tip, your tongue curling around the head before you swallowed him deeper, lips stretching, your fingers curling around the base to guide him. His hips jerked forward with a groan, bringing his hands to your clothed ass with a light smack, making you take him deeper.
“Fuck—y’know there was once a time the thought of doing this made you wanna kill me.”
“Yeah, you’ll be lucky if this doesn’t kill you.
“Death by head sounds… ah—” His voice broke off into a strangled sound when you hollowed your cheeks, sucking him deep until the head bumped the back of your throat.
You moaned softly around him, your free hand gripping the base of his length, pulling him in just a little deeper, your eyes fluttering closed as you felt his cock twitch against your tongue. “So good, hah—” Ryusui’s hand left your cheeks to tangle in your hair, not pulling, just holding, his hips rocking forward helplessly as you set a rhythm—deep, eager pulls, the wet sounds echoing in the quiet room.
Your own voice was muffled around him, but you managed to breathe out something filthy against his skin, your lips brushing the sensitive underside as you worked him: “Want you… wanna taste you so bad… fill my throat, Ryu, please—give it to me.”
His thighs trembled under your hands. “Baby—fuck, don't say that, you're gonna make me—” You didn’t let up, sucking harder, your hands squeezing him as you pulled him into your mouth, your throat relaxing as you took more, swallowed more, until he broke entirely.
“Ahh—” he whimpered, hips jerking, before he spilled deep, hot, filling your mouth as he groaned out your name in a raw, shuddering rasp. You stayed there, eyes on him, swallowing every drop, your hands still holding him steady until his breathing evened out and his grip on your hair loosened into something tender.
“Fuck,” Ryusui whispered, breathless and wrecked, looking down at you like you’d just undone him completely. His thumb brushed over your cheek as you looked up, licking your lips.
"You taste so sweet Ryu, my pretty boy." You smiled, sitting back up and holding his flushed face in your hands.
After taking a minute to compose himself, Ryusui huffed and looked at you with a dark smirk stretched across his face. “Now it’s your turn.”
“Huh?” You were in the middle of tilting your head in confusion when he picked you up in his arms and pinned you down on the bed.
“Dress off, or I’ll rip it off.” He grumbled out, tone firm and demanding.
With a sigh, you nodded, slowly lifting your dress over your head leaving you in just your bra and panties. “Happy?”
Ryusui let out a teasing laugh as he palmed your soaked panties, “can’t believe just touching me got you so riled up.”
“You’re the one who was on the verge of tears when I was going down on you, so stop complaining.” You pouted a heavy blush coating your face.
A shiver ran through Ryusui at your retort, the truth in your words causing him to growl out, "You little..." he began, before shaking his head and leaning down to plant a kiss on your cheek.
"You're lucky I adore you enough to humor your sass." he murmured into your ear, his hand snaking under the fabric of your bra.
With one hand, Ryusui unclips your bra and tosses it to the side then cups your breasts with both hands now, toying and playing with your nipples before putting one in his mouth. He sucks on it gently, tongue sliding against the slits leaving you a whimpering mess.
Once he was done abusing your tits, his lips trailed down, warm and slow, leaving a path of fire along your skin. With a teasing pause, he hooked his fingers into the lace at your hips—
“Beg for it,” he murmured, voice dark with desire. “Tell me how bad you want this.”
You shivered beneath him, breath hitching. This man—greedy as ever—always wanted control... but damn if you didn’t love giving it to him.
His fingers brushed just against you—teasing, maddeningly slow—and when you gasped out a trembling "please," he finally relented. He pulled your soaked panties down your legs and you impatiently wriggle out of them.
"Good girl," Ryusui purred, his voice thick with satisfaction as his thumb circled your clit in slow, firm strokes. "You say it so sweet… like you were born to beg for me." He leaned down, lips grazing your ear. "But we’re just getting started."
The dim lights illuminated the way his hand, fingers blue from the petrification, rested against your pulsating pussy before spreading your folds with them. With his thumb still pressing on your clit, his middle finger circles your cunt covering it in your slick before inserting it inside you.
Your walls clench around him as he begins curling his finger inside, making you bite your lip to avoid screaming at the sudden sensation of being filled up.
Each touch, each stroke, sent jolts of heat through you. One finger became two, the stretch a delicious mix of pleasure and need. As their movements continued, he leaned down, capturing your lips in a searing kiss. Every moan you let out only seemed to stoke the fire within him. There was something undeniably intoxicating about this man and the way he effortlessly took control of you, making you feel alive and desired.
"Can you handle more?" Ryusui murmured against your skin, his lips trailing down your neck, nipping softy at the sensitive flesh there. "I want to make you fall completely apart for me." His words were a gentle command, one you knew all too well he'd never give you the chance to disobey.
“Mhm, more— faster,” you breathed out and who was Ryusui to deny his lovers request. Hearing the pleading tone in your voice made him begin pumping his fingers inside you at a quicker pace, making you release noises you thought you weren’t capable of making. Your thighs shook uncontrollably at the overstimulation of his fingers hitting your gummy sweet spot and his thumb circling around your clit relentlessly.
And then… he just stopped.
Damn him. That tease just had to pull his fingers out when you were about to reach your climax.
There was something about the sudden absence of Ryusui's touch that left you breathless. It was a cruel tease to be denied the release you craved, your body trembling in anticipation. And then you realized what he was doing, watching as he slowly lifted the fingers that he'd had inside you just moments earlier, bringing them to his mouth.
He made a show of licking his fingers, eyes locking with yours, as if he was savoring your taste. "Oh, you taste so sweet. Always have from the day that I met you." He murmured, voice hoarse with desire.
Now, his face is sinfully close your heat and he dives in— tongue first.
His tongue moved with purpose—hot, insistent, worshiping every inch of you like he was starved for your taste. Each flick sent sparks racing through your nerves, his lips sealing around you in a maddening rhythm. The wet sounds filled the dim room, echoing with every slick kiss and suckle.
"R-Ryusui—!" you gasped, fingers twisting into the sheets as pleasure coiled tight in your core.
He didn’t stop. Didn’t slow. Only growled low against your flesh, the vibration nearly undoing you right then and there. This man had promised to make you fall apart—and he was doing it beautifully.
And when his thumb found your clit again?
You were done for.
Your release was right there, teasing you with its closeness. But then his fingers entered you again, the sudden fullness both delicious and just on the edge of pain, making your eyes well up with tears. “I’m so close, baby please!”
"Not yet," Ryusui murmurs, his voice gruff with desire. He looks up, his eyes meeting yours for a moment, and there it is again: that possessive gleam.
"I want to watch you squirm," he continues, his thumb tracing a featherlight circle on your clit. "I want to hear you beg for me. Only me."
The words spark something inside you, a mix of defiance and need. "Then make me," you retort, despite the way your body is trembling in anticipation.
"Oh, I will." Ryusui's lips curve into a sinful smirk before he leans back in, his mouth closing over your core once more.
His tongue is relentless, his every action making you forget anything else exists. Your legs are already trembling, your muscles taut as a bowstring.
Ryusui's other hand glides up your body, his touch leaving a trail of fire in its wake. When his palm finds your breast, he kneads the sensitive flesh, his grip possessive and firm.
“Ahh,Ryu-” you cried out as you try hold back your screams as your eyes roll backwards into your head.
Everything was too much, his hand squeezing your nipple, his thumb circling your clit, his fingers pumping inside you and his tongue devouring you whole. The man was eating you out like it was his last meal and was touching every sensitive place in your body to where you’d probably still feel them throbbing a week from now.
Ryusui was a fucking freak. As he was busy devouring you, he’d already come from just the sight of you as he’d been dry humping your sheets whilst going down on you.
Now that he’d gotten more than enough of his fair share of pleasure tonight, he was planning to milk you dry and give you a timeeee— without impregnating you because stone world…
He hummed at your taste, the vibrations shooting right up your walls and into the knot tightening in your guts— and when he curled his fingers upwards, at that spot that made you see stars, the dam breaks.
First orgasm in the stone world led to you squirting all over Ryusui Nanami’s face— and he couldn’t be more ecstatic.
“Oh myyy,” you cried out, spraying your release all over. It dribbled out your pussy and past the lower half of his face, to which his jaw widened as his mouth gaped— greedily aiming to slurp at your juices while simultaneously flicking your bean. The stimulation had your brain going dumb, as you fell flat onto your bed, drool collecting at the corner of your mouth and staining your sheets damp.
He let you ride out the euphoric bliss, the movements of his fingers and the lapping of his tongue slowing down the more your body reacted to the overstimulation. When he deemed you well spent, he lets up, slipping his fingers out and popping them back in his mouth, swirling your taste across his pallets, “like sugar on my tongue!”
♟️a/n
12/10/25
6000 words
@smiskisworld/-fischll/fischll
-TYSM FOR READING DOGTOOTH AND GIVING ME REQUESTS!!
-this is written from a request I got and just reading it made me think of a whole plot and backstory I really loved writing it!! The concept is sooo nice I couldn’t help but develop the story so please don’t mind the small flashbacks in between.
-ALSO AM I GETTING BETTER AT WRITING SMUT?? I think I am I still can’t do actual smut but I think foreplay is just as intimate yk
-anyways hope y’all liked week 2 of my kinktober ik it’s similar to the first one but with more story this time but don’t worry this will probably be my last ryusui fic for the next few weeks of kinktober Senku and tsukasa are next!!!
THE PERSEUS ROCKED GENTLY BENEATH YOUR FEET, the steady rhythm of waves almost soothing—if not for the alcohol buzzing in your veins. You clutched Ryusui's arm as the two of you stumbled down the dim hallway, muffling your laughter behind your hand.
"Shhh," you hissed through giggles, nearly tripping over your own feet. "If the others hear us—"
Ryusui only threw his head back and laughed louder, golden hair catching the lantern light. "Let them! The great Ryusui Nanami is allowed his pleasures, is he not?" His voice dropped into a conspiratorial purr as he leaned closer. "And tonight, that pleasure is you, my treasure."
The words sent a flush straight through you. Before you could tease him back, you reached his door, fumbling with the handle until it gave. You both stumbled inside, nearly toppling over as the door shut behind you.
And then his mouth was on yours.
He kissed like a storm—hot, greedy, devouring. You barely had time to gasp before his tongue swept past your lips, stealing your breath. His hands gripped your waist, dragging you against him as he pressed you back against the door.
"Gods, you taste divine," he groaned between kisses, teeth grazing your lower lip. "Truly... I'll never get enough of you."
You laughed breathlessly, tugging at his shirt, shoving it up over his head until it hit the floor. He matched your urgency, tugging impatiently at your clothes, almost ripping off your dress—both of you shedding layers in a messy, frantic heap. There was no elegance in it—just heat, laughter, and the sharp sting of want.
When you finally shoved him onto the bed, his grin turned wicked. "Ohhh, daring tonight, are we?"
You straddled him before he could say more, silencing his cocky words with another heated kiss as you unclipped your bra, tossing it to the side. Shivering slightly at the cool air hitting your breasts, you watched as Ryusuis smirk grew wider at the sight and his hands immediately cupped the soft mounds of flesh. The blonde pinched your hardened nipples before putting one of them into his mouth, making you moan softly against his neck that you were now peppering soft kisses on.
He chuckled lowly at this, he had one hand toying and stretching one of them whilst his tongue swirled around the other.
"Ngh... it's my turn today, you had your fun last night." You attempted to scold him, but he was relentless in abusing your tits with his touch.
You were supposed to be the dominant one today, the struggles of being in a relationship with someone who might as well be your clone. The two of you would always try switching roles but there were some nights where the boy just wouldn't listen. And tonight was that night.
Hearing you complain about the situation made the blondes eyes twinkle in amusement, he grabbed your plush thighs and lifted you up to where you were now seated on his muscled chest. "Have your fun and ride my face, princess. Don’t need nothin’ in return so go crazy."
Your cheeks flushed as you glanced down at the naked man beneath you, his eyes half-lidded as he smiled back up at you. "Okay, but don't try flipping me over and steal the show."
"Perish the thought! I'm all yours tonight baby." His fingers danced along your hips as he eased your body to rest over his face, legs on either side of his head. He tore off your panties, exposing your bare heat to him and he licked his lips with a smirk. "Can't wait to get a taste."
"Ryusuiii—" You heaved a sigh as his lips connected with your lower ones. His tongue stroked along your slit, tasting you as he lapped at your clit. His hands pinched your nipples, moving back down your frame to rest on your hips as he guided you to move against his touch.
"Fuck," Your hips ground into his face as he tugged your clit into his mouth, sucking down on it harshly. His hands moved around to hold on to your ass as he guided you to come in contact with his face. Your cheeks were tinged pink as he worked your body, your fingers moving down to tug his messy hair as you became unsteady at his movements.
Ryusui hummed in appreciation as you tugged his hair, making him suck down harder on your labia. One of his hands moved from its position on your behind to prod at your sex, fingers grazing against your wet cunt. Sucking in a breath you ground your sex down against him, urging him to insert a finger into your tightness.
"Eager are we, what was that about wanting to be in control?" He teased, as he felt your walls squeeze around his index finger. The sensation sending a throbbing jolt of pleasure down to his stiff cock, imagining what you would feel like wrapped around his length. Unfortunately, that wouldn’t be happening any time soon— thank the stone worlds lack of condoms.
"Ryu, I’m literally on your face if that’s not being in control I don’t know what is—" You then whined as he pulled his lips away from your sex, fingers tracing around your entrance as he looked up at you. That damn tease, he loved seeing you drunk off his touch but loved edging you even more.
"What was that about being in control, love? Tell me-" His breath was hot against your lower lips and you tried feebly to ground down on his face to get him to touch you again but his hands held your ass tightly, massaging the cheeks between his nimble fingers, "If you wanna come, y’know what to say."
Your body shuddered at his sly words and it made your lower body twinge in anticipation. Ryusuis fingers continued to play with your ass as his thumbs brushed your lower lips. He was such a tease.
"Ugh, Ryusui. Fuck, okay… Please-"
"Please what?" He pressed a kiss against your clit, making pleasure flutter through you.
"Please make me come," You whined, the tight coil inside you was so close to come undone and you needed a release.
Ryusui didn't reply but instead latched his lips back onto your clit, tongue lashing against it as he sucked down hard. Inserting two fingers back into your heat and curling them so they hit your sweet spot with every thrust. Your orgasm was building back up rapidly and your moans became louder as you were about to reach your climax.
As if sensing you were close once again, Ryusui pulled his lips from your heat once again, stilling his fingers inside you and straightening them so they weren't touching that special spot inside you. You whined again in frustration as you feebly bucked your hips against his fingers, trying to create some friction and edge you back towards your release.
"I'm enjoying having you on top of me like this, it would be such a shame to finish it now-" Ryusui was smirking now, he was teasing you. "Can't blame me, especially with a view like this."
"Ryu," You were crying now, but you were desperate for a release. Your body felt as if it was on fire and Ryusui was the only person that could put it out.
"You want to come on my face, Love?"
"Mhm, baby please. I give in, okay!" You groaned at his lewd words, did he have to put it like that.
"I want you to come on my face."
His fingers curled inside you once more, beginning a ridiculously fast pace, pivoting his fingers so they hit your sweet spot once more. You ground your hips down against his touch as his lips latched onto your clit again, this time he wasn't holding back as he continued to suck furiously at your clit. The orgasm denial he had previously given you made it easier for him to build you back up to your release and you were going to come hard and fast.
He moved the hand that was holding your ass back and landed a harsh smack against your flesh, your core now pressed harder against his face. The dull ebb of pain mixed with the intense pressure on your sex was overwhelming and you couldn't stop the intense sensation captivating your body.
"Ryuuu," You cried his name out as your orgasm crashed down around you, your body shuddering as the tight coil inside you broke. Your body was weak and you tried to stay upright to stop from suffocating your lover but you were finding it difficult to generate the energy to do so. Ryusui followed the movements of your bucking hips as he continued thrusting his fingers into you, flicking his tongue against your clit as he helped you ride out your climax.
"You're so beautiful, my love." Ryusui tugged your quivering naked body closer to his own, brushing his fingers against your face before holding the side of your neck and pulling you into a sultry kiss, his tongue slipping between your lips. You could taste yourself on his tongue and remnants of your climax were still on his face.
"See how good you taste? I can't get enough," You could feel his sticky , cum-covered cock pressed against your hip as he continued to press sloppy kisses along your neck, biting down on the sensitive skin of your collarbone.
Of course, he’d came from pleasuring you.
After all, your pleasure was his pleasure.
♟️a/n
05/10/25
2000 words
@smiskisworld/-fischll
-first time writing a graphic ass smut, icl I haven’t read a lot this year so I probably write like I’m stuck in 2021(that era had the freakiest smut imo) so gimme feedback
-also gimme more requests I’ll literally do any character and any prompt bcs I need to learn how to write well and the only way to learn is by doing
-also about my ryusui fic im probably not gonna post chapters on tumblr until i get to like chapter 20 on wattpad so if u guys want to read the new chapters head over to my wattpad @-fischll ik there’s a stereotype that wattpad writing is ass which it sometimes is BUT I SWEAR MINE ISNT BAD ANYMOREE
-anyways hope y’all liked week 1 of my kinktober im lowkey geeking bcs ive always wanted to write for it and now i have the time tooo!!
