Jealous Boy
DENJI X MALE READER
Warnings yoshida , jealousy , kissing , bottom denji , tiny plot , reassurance , consent , blow job ,
You got paired up with Yoshida, Yoku and Asa for the devil hunting club. Kishibe thought it’d be a good idea for you to go to school with Denji, making it more challenging for people trying to find out who chainsaw man was.
It’s been weeks since first meeting Yoshida, hanging out with him everyday at school, even out of school hours sometimes.
Denji watched from afar, waiting on you to walk home together like always. Arms crossed, eyes squinted with his lips pursed.
He’d wish you’d just hurry up, the small laughs and friendly gestures you made after Yoshida would speak had him itching to walk off. He couldn’t be that funny.
After saying your goodbyes, you quickly jog over to Denji, greeting him with a soft smile then grabbing his hand beginning to walk. The same soft smile that Yoshida was beginning to see as well.
“Are you and Yoshida having sex?”
…
The question completely threw you off, stammering for a moment at how straightforward he was before bursting out into laughter.
“What?” You look away to continue giggling after seeing his stern serious face, now a little flushed at your unseriousness.
He groans. “You’re having sex!”
Looking at him in disbelief after you calm down and stop laughing in his face. “Are you for real?” You ask and now it was his turn to look away, snatching his hand from your hold.
“You only hang out with him! I’m right here, I’m your boyfriend!” He demanded, jealousy seething through. Sure you could have friends, he wasn’t a controlling asshole but he did want all your attention, not this guy who swooped in randomly.
Sighing you speak calmly. “I thought you liked him? Didn’t he take you to that cafe?”
Denji nods. “I got cake and uh- care.. cara- that crème thing!” He huffs, not being able to pronounce caramel.
You grab his wrist softly to pull him along, he complained the entire way; ranting how close Yoshida was, how he looked at you or spending too much time with each other.
-
“Den, hey.” You stop him from walking away when stepping inside.
“I’m not cheating on you, I promise. Yoshida is just my friend and that’s all he’ll ever be.” You reassure him, his furrowed eyebrows have you leaving a peck on his nose and they soften just as you wanted.
His head sinks down after letting the words sink in. “Good cuz I’m better.” Denji replied swinging his head back up to grin, sharp teeth peaking through.
“Now since you’re sooo jealous about sex…” Dragging out your words, you lean in to kiss Denji’s lips, testing the waters before he reciprocates the action messily, pulling you toward yours bedroom as best as he could without tripping over his feet.
Once he laid down, your body hovering over his he averted his eyes, pinkness flooding his cheeks.
“What do you want me to do?” You question him peppering soft kisses on his jaw, listening to him stammer.
“Whatever you want.” He responds needy and too quickly, just wanting to be touched.
Shaking your head not pleased with his answer you hum. “Ah, not good enough.”
Refusing to touch him any further, Denji groans frustrated. Finally giving in, ignoring the warm feeling he felt everywhere throughout his body, being at your mercy while also forcing him to be in somewhat charge.
“I want… marks everywhere- on my neck.” He tilts his head giving you access to the soft sensitive skin.
With a sound of approval you dip down, starting with soft opened mouthed kisses, enjoying the way he arches up to be pressed against your body.
Easing into a faster pace, small bites and nibbles all around his flesh; sucking enough to leave a bruise then placing your soaked tongue over the spots you’ve abused just as he wanted.
Denji seemed to be enjoying the treatment, whines escaping that he tried to suppress, especially when you pulled back to look at your work. The cool air hitting his saliva coated and now bruising neck.
“You okay?”
Your boyfriend nodded, the tips of his ears now flooded with pink, any ounce of tension had disappeared with you making sure he’s alright. Something important to him even if he didn’t completely realize.
Denji lifted his hips when you started playing with the fabric, allowing you to push them down, his legs kicking them off to finish the job.
Both of your lips started to get sore and puffy, no complaints though especially with the dazed look and small smile that coated Denji’s face, his features scrunched together and lips parted after you slid your hands under his shirt just barley grazing over his nipples.
The change made you smirk, loving how sensitive he was when you play with his nubs, thumb and index finger gently twisting.
Whimpering he snatches your hand pushing it down to his bottom half, you weren’t sure if his goal was to land on his waist or dick so you simply hold yourself up by the mattress.
After taking a breath, taken back from his nipples hardening Denji’s grinds his hips into you, his cock rubbing against your thigh, humping into you like a complete mess.
While he chased the needed friction with the help of you occasionally moving your thigh in sync, you’d been groping yourself each time he’d let a breathy whine or groan out, feeling yourself twitch each time his cock pressed against you.
“Easy..” He started getting himself a little too worked up.
Your hands slow his movements, letting him catch his breath. He glared at you for ruining his almost high even if he was getting overstimulated. Gentle kisses scattered around his face and jaw, hands running down your toned back.
“Do you want my mouth somewhere else?” You murmur against his throat, wrapping your hand around his hard shaft, he nods frantically in response. “Yes- god yes.”
Jerking his body at your slow strokes, head tilted back one moment then sitting up to watch you slither down, more kisses landing down his torso until your lips make contact with his base.
He gripped the sheets beneath him when you licked the tip in small flicks, poor sensitive Denji who could’ve already came from kissing and grinding.
Your tongue left long stripes from the bottom to top, finally wrapping your lips around him, sucking gently.
He can’t keep quiet even if he tried, each time your wet tongue lapped up and down— the feeling of your soft lips made him cry out moans. He sounded pathetic and you enjoyed every second of it.
Keeping eye contact with him, even when his eyes clasped shut you loved seeing his expressions.
His thighs trembled, hips jerking forward making his hard length hit the back of your throat. One of his hands gripped your shoulder, the other holding your hand that you offered.
god you were all his, while your other hand rubs soft circles on his thigh with such gentleness he wasn’t accustomed too, a different contrast to your mouth.
Plus the mocking sympathetic look you had written all over your face as you felt him twitch against your tongue. It made him go over the edge, giving you a warning he’s about to come like you’d move away from him?
Of course not. You bobbed your head faster, bottoming out while ropes of cum hit your throat, adding an even more soaked mess than just your spit.
Denji groaned with a choked sob, eyes rolling back, biting his tongue, tensed body relaxing after you pulling away with a pop, whimpering at the cold air. Cum dripped down your chin, the rest swallowed, the sight had Denji ready for another round.
Both of you caught your breath, Denji a sweaty and overwhelmed mess. “You okay?” The question was panted out but also gentle, brushing his hair away from his forehead. Letting go of his hand to grab wipes.
Denjis sharp teeth peaked out once again, eyes lidded with a lazy but proud smirk on his lips. He hummed to answer your question.
“Mhm.”
He let you clean his thighs up where semen had made its way to his skin, dressing him again he pulls you with him to flop down on the bed, holding each other in a comfortable silence.










