Author’s Note: Welp, this ended up way longer than I plannedXD Sorry for the delays but I hope y’all like it and please please please gimme ALLLLLL the feedback! Been a while since I wrote and very nervous haha XD
Summary: Y’all have been friends for 5 years, but there are still sides to him that you’d never imagined. Will his tricks work or push you away?
Pairing: prisonguard!sunoo x inmate!femalereader (mentions of Sunghoon)
Rating: 18+
Genre: angst, smut, one-shot, prison au, yandere fic, happy ending
Word Count: 4,124
Warnings: 18+ MINORS DNI extreme “Brought the Heat Back” feelings, explicit content, oral sex (f. receiving), breast play, squirting, clit play, praise kink, neck kissing, degradation, unprotected p in v (be smart kids), yandere/obsession themes, secretly monitored self-pleasure, wrongful imprisonment, Y/N glossing over red flags (don’t do this irl pls)
Since the summer before you went into high school, you and Sunoo have been friends. It started when you went to his friend Jake's house for an end-of-middle-school pool party, and you both bonded over judging the annoying tweens around you.
As fate would have it, you ended up having many of the same class periods all throughout high school and grew even closer over several study sessions. Both went solo together to dances but acted like one asked the other when anyone asked to avoid looking pathetic.
That is until the senior year Sadie Hawkins dance. A new student had joined the roster and immediately became the focal point of school for you. His name was Sunghoon, and he was the right amount of reserved and sarcastic to give you heart eyes.
Despite your nerves and insecurities, you worked up the courage to ask Hoon (a nickname he recently accepted after many hangouts together) to the dance. To your surprise, he rapidly accepted your invitation!
Proud of yourself and overwhelmed with excitement, you call Sunoo after school to tell him of this accomplishment and see if he wanted to go shopping with you this weekend.
After a quick snack, you call your best friend, "Hey, Sun-sun, are you busy?" "Nope, Y/N, just avoiding homework, haha. What's up?" "Ohhhhh well, nothing much except I asked Hoon to the dance, and he said yes! Can you believe that???".
Deafening silence extinguishes your enthusiasm as quickly as it sparked, "Um, Sunoo...you there?"
A couple more seconds pass, and he says, "The call is still going, isn't it?" With a scoff, you retort, "Oh, excuse me, sassy king, it was hard to tell when you made no indication that you heard me."
He has the nerve to get offended and goes, "Sorry if I didn't clap for joy at the fact that for the first time since we came to this shithole, I'll have to stay home for a dance. I mean, whoopee for you, but you gave me no warning that you'd abandon me like this."
You are speechless. It's the last reaction you expected, and now you feel bad for not at least letting him know. "I... I'm not sorry I asked him, but I apologize for not setting you up or warning you first. I can try to hook you up with my friend if you want!" "No, it’s fine. Have fun. I have to get started on homework. Talk to you later. Unless you forget all about me...”
With that, he hangs up and leaves you stunned, sitting on your bed slack-jawed. You honestly thought he would be happy for you. Feeling lost, you call your friend Ara, "I have no idea why he would react that way. Can you believe that?!"
She gives a disappointed sigh, then says, "I actually can. Imagine if he gave you no heads up and sprung on you having a date to the dance. And don't even pretend like that'd be okay with you, girl.”
Dejectedly, you admit that she’s right and just can’t get over the intensity of his reaction, to which Ara says, “Oh come on, you can’t be this clueless... he has had a crush on you forever.” “WHAT? Noooo, don’t give me false hope like that.”
She snorts. “Heh, you finally admit it. You have a thing for him! Well, it looks like you have to choose. Pretty new boy or tried and true rock?”
Pondering her words, you make a plan of action, “Hmmm, well, I may never get lucky enough for a guy like Hoon not to reject me, so I’ll stick with that, and then next week, I’ll tell Sunoo how I feel.”
Giving a hum of approval for your plan, Ara warns you not to play with either boy’s emotions or neglect your own. “Do what makes you happy, Y/N; whoever you don’t choose will just have to deal.”
Meanwhile, Sunoo avoids you like the plague for the next week, even going so far as to switch lab partners.
All of that is almost forgotten once the day of the dance finally arrives. You feel like the prettiest vampire queen in a floor-length ruby-toned number that lays perfectly off your shoulders and hugs all the right places.
After Hoon's mom drops you off, the night is a blur. A magical blur where he indeed must be a prince in another life with how well he is treating you. After a couple of slow songs with y'all almost kissing, you excuse yourself to the restroom to try to settle your nerves and try to summon some courage.
You exit, and upon reaching the hallway, you see Sunoo. He looks awestruck, and you blush. "Hey, Y/N, I'm really sorry. I overreacted, and well, I miss my friend. Will she accept me back?"
Pretending to think, you finally smirk and say, "I suppose I will accept your apology. I missed you too!" After tightly embracing each other, he steps back and says, "Well, my beautiful bestie, you wanna head back in and ditch Mr. Stuck Up? The chaperones are dissociating, so I'll be able to sneak in no problem."
You back away, upset, "First off, flattery won't get me to allow you to talk badly of him or convince me to sneak you in. Secondly, he is not stuck up; he is just still fairly new and reserved. Once you give him a chance, you'll see he is really cool!"
Rolling his eyes, he walks away, waving you off, "Have fun with my replacement. I'll see you around, maybe.."
In shock, you are frozen in the shadows when Hoon comes to find you. "There you are. You were gone so long that I got worried about you and had to come look for you. Everything okay?"
Smiling away the tears threatening to ruin your makeup, you nod and head back inside. You try to enjoy the rest of the dance, but the look in Sunoo's eyes haunts your memory.
It was like when he got picked last for dodgeball and by the opposite team, not even by you, but more intense and frightening if you're honest.
After graduation, you hear he got accepted to the security guard training program at the local jail while you were still waiting to hear back from your photography internship. It was annoying, but you try to hope it'll still happen.
The park was quiet for once, so you head over to take some more nature shots in your free time. Panning over to the left of you, a figure comes into focus, coming towards you. Shockingly, you see Sunoo smiling in your direction, and anxiety freezes you in place.
"Hello, stranger," he quips as he sits beside you on the bench. You scoot away from him, annoyed that he was so lighthearted when he was the one who parted ways.
"Can I help you, Mr. Kim?" "Why so formal? It's just me, Y/N." Crossing your arms, you look the other way and say, "Well, I don't tend to act friendly to people who walk out of my life for stupid reasons."
Pouting, he gets up suddenly, leaving you even more confused than before, then reappears about 5 minutes later with two cups in his possession. "All right, peace treaty apple juice. Let’s forget about all the high school silliness and share this with me before I go off to training.”
Almost denying his request, you realize how dehydrated you are and say fuck it downing the whole thing.
Not even 5 minutes pass, and you start to feel weird. You are barely able to convey this to Sunoo before you pass out. Unable to tell how long you were out, you awaken to being handcuffed and shoved in a police car.
Through half-open eyes, you scan around for Sunoo or anyone you know, but all you meet are the blinding sirens, which only make the pounding in your head worse.
The entire ride to the processing center, your mind is racing, trying to figure out how you got in this predicament, and freaking out because your independent life has only just begun and you had so many plans!
They bring you in and take your mugshot. Nobody is telling you what is happening, assuming you are only playing naïve to pull one over on them.
Going down the hall of multiple holding cells, the current inmates look just as confused as you feel, wondering what such a young girl is doing in this wretched place.
Distracted with your thoughts, you practically are thrown into a tiny room with just a bed, sink, and a hole to use the bathroom with no windows.
About to ask why you were not given the option for a call or are being separated from the rest of the people (not that you were upset, but it was worrying you how dangerously you were being treated), the female guard shoves you into the room and slams the door in your face with a "Shut the fuck up you waste of space."
Seems like around 3 days have passed. The only way you can tell is because you have been given 6 meal trays and heard from your trek to your room on the first day, inmates being upset they only get 2 meals daily.
While you are still confused about why the hell you are in this place, your strategy at this point is just to do as you are told and try to stay low until you can speak to someone with legitimate authority.
With this new mindset, the rest of your body is returning to normal, which is mostly a good thing...
The exception is your libido. It has returned with a vengeance, and once the lights go out on the 4th day, you decide to risk it not having spotted a camera yet.
Between your regular sex drive and all of the unfairness and frustrations with your situation, you cannot hold back any longer.
Right before you are about to hit your climax, you hear the keys in your door and freeze.
Pretending to sleep, you roll over onto your side and stick your fingers in your mouth to hide the smell of your sex, hoping they will buy that you still soothe yourself this way as an almost adult.
The door swings open, and you hear the footsteps approach you. You try to keep breathing normally even though you are terrified. The figure above you chuckles, and your heart plummets.
You try to convince yourself you are going insane, but there is no denying it once you hear the voice say, "Now, when did you start sucking your fingers when you sleep? In all of our sleepovers, I have never seen you do that."
You shoot up and start bawling, finally letting your body release all of the emotions that have been pent up since this whole ordeal began. Wrapping your arms around his neck, you pull him down into a tight embrace. Big mistake.
As he stands back up, he notices the sweat along your hairline from your previous activity and widens his eyes in concern, "Oh no, Y/N, do you feel okay? Are you getting a fever? You felt warm just now."
Blushing quicker than ever, you fervently shake your head in denial, "No, Sun-sun, I feel fine; was just a little warm, I promi-“
He cuts off your sentence by grabbing ahold of your chin and tilting your head up as he moves even closer to your ear whispering “Don’t lie to me when I saw everything you needy slut.”
Your eyes widen in horror, and confusion clouds your brain again as you look at him through your peripheral vision, "Wait, what do you mean? How? Why am I in here?"
Sinisterly chuckling, he gives you his cheeky smile. "Patience, I'll answer your questions and then help you with your little dilemma. Terribly sorry to interrupt, by the way, but you looked so sinful that I was hoping to catch you in the act." "Um, and what makes you think I would've let you? Or even needed your help?"
Sitting on the bed with you, he quirks up an eyebrow, "Slow down, I still haven't answered the first round of questions."
Pouting, you sit back against the wall and hold your knees to your chin, a medley of unpleasant feelings swirling in your gut.
Tucking a loose piece of hair behind your ear, he begins addressing your queries. "Okay so I may have commandeered the feed from your camera into a personal monitor so I can keep an eye on you. No biggie between friends, right?"
Your face turns red at him, using that title from when he went to M.I.A. for weeks after graduation. "How dare you..." you scowl at him. "Oh, now calm down, drama queen, so I can continue with my answers."
Begrudgingly, you do so but not without a lethal side eye aimed at the wall, slightly scared to direct it his way.
You never thought your friend would spy on you or call you a slut and aren’t keen to find out what other secrets are lying in wait.
Continuing his replies, “I know you would’ve let me because even if you try to deny it, we both have had feelings for each other since week one. As to you needing my help, I know you had everything perfectly under control but I feel like you crave more than your fingers kitten.”
Not daring to speak when he clocked your shit so accurately and your face looks like a tomato, you just hide your face. "Knew it." He states smugly. "Alright, on to the next matter: why are you here? It's all thanks to me, of course."
Slowly, you raise your head in horror as your entire body shakes. Scooting back as much as possible, you ask, "Wait, you are playing a trick on me, right? There is no reason for you to do that. Nice try, dude.."
He stands up and starts pacing around the room, "Oh, I had my reasons. First, things were getting too serious with that Hoon guy, and I didn't like it. And you might have found out you got accepted to a photography internship, which would take you away from me, and that can't happen...not yet. So, I would check your mail before you and only take out mail from the places you applied."
You stand up now with fists balled up at your sides. "What are you going on about? Not yet? Why don't you want me to be happy?" you scream at him with tears running down your face for the second time tonight.
As he approaches you, he wipes a tear from your cheek and kisses your forehead, "Oh darling, you still don't get it. I want nothing more than for you to be happy. Just not without me and not before I unlock the key to your tight pussy that I've dreamt about for years."
You freeze, staring at the wall, "What did you do? You still haven't answered why I got thrown in here and treated like a villain. Tell. Me. Now."
He sits you down on the bed again, looking down as if you were a rat caught in his trap. Which you were, by the way.
He squats down, staring into your soul as he reveals the remaining puzzle pieces. "Well, I got accepted into this place as a star trainee with excellent scores. They basically told me to use my best judgment and make them proud. My parents were not thrilled that I hadn't pursued a more upstanding career choice, so I wanted to prove to them that I could thrive here. You just happened to be the perfect muse to show them all my skills."
Taking a deep breath and looking too excited to finish relaying this info to you, he continues, "Well, when I spotted you in the park looking dejected but having that trying-to-distract-yourself look in your eyes, I knew it was my time to strike. I expertly mixed apple-flavored alcohol in the juice and then 'spilled' some on myself. I called a couple of buddies in the force to come over and help execute my plan."
All of your tears have dried up as you are burning up, wondering who the person is in front of you. "Don't worry, it gets better," he says as he pats your knee.
Cracking his neck, he nears the end of his story. "So basically, you are in here because I made you look like an underaged alcoholic by having the empty bottle right next to you, then lying to the officers and saying you were pressuring me to drink with you. Oh, also, you were trying to sell shots to our classmates and even the middle schoolers. They are so worried about this getting out with the mayoral election coming up and your parents being his friends that they aren’t allowing any visitors or calls from or for you until the sentencing.”
You stand up, knocking him on his ass in fury, "How could you?! If you had just told me how you felt ages ago, you could have gotten what you wanted instead of keeping it in and becoming this creepy psychopath! I demand a lawyer!”
He cackles while fully lying down on the floor, "You have no pull, sweetheart, but nice try, hah! Even your parents aren’t asking about you, hoping this all blows over and they can maintain their perfect image."
With his eyes closed, still laughing, you cage him beneath you and start to choke him. This time, he freezes and smirks up at you, "Oh, this is how you wanna play it, huh? Pretending you are furious instead of insanely turned on and hoping this ends with you knowing how I feel inside of you. Cute, really."
You scowl down at him and are about to get off of him when he roughly grabs your hips and pulls you back down onto him. "Oh no, there's no getting out of this. How does it feel finally being able to feel how excited you make me? Honestly, it feels like you are excited, too, with the wet spot you left on me."
Face flushing in embarrassment, you glance at the floor to escape his intense gaze, but all masking ability flies out of the window as soon as he bucks his hips against you, eliciting a breathy whimper from your throat.
The moment it exits your mouth, you bite your lip and try to escape his hold. Or at least you meant to...
Instead, you end up grinding against his hardening cock through both of your pants. Feeling his deep chuckle against your clit, you spasm, and he just grins as he pulls you down to attack your lips with a furiously passionate set of long-awaited kisses, entwining your tongues and both assaulting the other's lips with teasing sucks and bites.
When you finally can pull away and catch your breath, he sits up as you wobbly stand and immediately backs you into the bed with his arms on either side of your head, licking from your collarbone up to your ear lobe, enjoying you moaning his name.
That was the final straw of resolve. It snapped like the tiniest twig in your core, and an animalistic need overwhelmed you as you dug your claws into his back underneath the plain white under-uniform tee that clung to his muscles just right.
Gasping for air, you beg, “Sunoo. Please...I need you.." while trying to undress him.
He smirks while he cocks his head to the side, "You're lucky hearing you beg was my last thread of teasing you leaving. Strip for me, needy whore."
With that, you spring onto your feet like a lithe cat and strip with lightning speed, laying back on the bed with everything exposed down to your arousal-soaked lips.
You usually were shyer, but you couldn't help it after the earlier interruption, plus finding out he felt the same way. You would deal with the red flags after you came.
Staying in his simple yet sexy white tee and dark grey workout pants, he descends like a hawk. He licks a broad stripe from your pussy to your sensitive bundle of nerves, making you cry out and grip his hair to keep your soul from flying out of your body too rapidly.
Immediately, you trap his neck between your thighs, not letting him weasel his way away and tease you for a second more.
He picks up on your neediness, and tongue fucks your velvety cunt whilst moaning into you, letting any insecurity of smelling or tasting weird disappear without a trace.
Rising up on his elbows, he makes a show of licking his lips, leaving his chin shiny with your pleasure, and makes his way up your body so you can taste yourself off of him as he makes circles with his thumb on your growingly sensitive clit.
Feeling your high about to crash upon you, you exhale, "Sunoo, I'm about to." Yet, before you can finish your sentence, he shoves you off of the edge by taking your plump breast into his mouth and matching the pace of his fingers with his tongue around your nipple.
As you cum, he disappears between your thighs again, not wanting to waste a single drop (or leave any evidence) while continuing to squeeze and slap your tits. When he can feel you are getting close again, he quickly makes space between your bodies, causing you to sit up and dig your nails into his thighs, making him moan loudly.
Then he adds salt to the wound by lightly slapping your pussy, making you squirt for the first time all over the bottom of his shirt and dick print.
Straddling him now that he is fully erect is torturous; while you nibble along his neck and behind his ear, you ask, “C’mon Sunoo, I need to feel you in me...please.”
Throwing his head back to allow you to kiss more of his neck, he just smirks and says, “Well, someone is needy tonight...well, you have been such a good little thing for me, I will grant your wish, pretty. First, you have to get up so I can get out of these damp clothes”.
Feeling bold, you raise up just enough to pull down his pants along with his boxers and then straddle him again while he sits up and removes his shirt while kissing and playing with your perfect tits.
After you give him your adorable yet seductive pleading eyes, he stops wasting time. He flips you onto your back again and, with utmost sincerity and care in his eyes, says, “You ready? Stop me if it hurts, okay? I really do care about you.”
Tears welling in your eyes, you nod and subtly pull his hips closer to you. You have liked him for a long time, and despite all of the nasty lust that has occurred tonight, it was weirdly healing at the same time.
He slowly slides the tip in, and after a few seconds, you surprisingly quickly can let him quicken his thrusts and go even deeper, both uttering sensual guttural noises in unison as soon as he bottoms out.
You notice him blush and quirk your eyebrow this time asking what is going on. He looks to the side then admits,” Well, this feels amazing, like even better than I’ve imagined, and I know that sounds cliché, but trust me...that’s a big deal. And well, I don’t think I’ll last much longer, sadly; I want to, but...yeah, sorry..”
Latching your ankles around his hips, you just bite your lips and eyefuck him as a green light, to which he gives you a deep, caring kiss as he slowly hits that sweet spot inside you, resulting in a simultaneous orgasm with the both of you collapsing in sweet bliss.
He cannot stay around too long, or the guard headquarters will get suspicious, but he lingers as long as he can while he tries to rinse out your delicious scent from his clothing.
You have the best sleep that night and are oddly comforted by someone caring that much. You are at peace knowing there are mutual feelings and hoping y'all can date normally once you are released.
Until you are released (about a week later), Sunoo frequently visits your cell of solitude because he is the only guard who can "handle" you. Over time, you become closer and decide that you will finally pursue a healthy relationship once you are free, and he will not have to stalk you anymore.
