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gimmethatagustd · 10 months

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dirty, dirty boy | kth + knj

For Taehyung, the only revenge sweeter than fucking Namjoon's girlfriend behind his back is fucking Namjoon from the back.

↳ pairing: fuckboy!taehyung x namjoon (from only here to sin)

↳ rating/genre: BTS | 18+ | enemies to… enemies with benefits ?? | smut

↳ wc/date: 4.3k | July 2023

↳ warnings: typical ohts!tae level of emotional manipulation, loss of virginity/virginity kink, hate sex, blowjob, anal fingering, protected anal sex, slut-shaming, humiliation, degradation, they're mean to each other in general lol, tae and jk are fwbs (is it really a jai fic if there isn't a taekook moment?), marijuana, sex under the influence (is it really a jai fic without some weed?) so ig it's kinda dubcon if this was real life but in the context of the fic they're both fully aware of their actions

↳ notes: if you know ohts!taehyung then you know that he loves to use his dick for revenge 🤷🏽‍♀️ also, i went back and forth on whether i should write this using third person or second person to refer to the main character in only here to sin. i decided that since some people might read this as a standalone, i would use third person. it also kind of felt weird to say "you" when there isn't actually a "you" character in the story lol. i hope that makes sense/y'all don't mind

↳ masterlist / taglist

↳ what was jai listening to? a fuckboy spotify playlist

“You’re not even just a little bit curious, Joonie?”

Taehyung’s tongue glides along the edge of the rolling paper pinched between his index fingers and thumbs. Little clusters of purple grapes drawn in a cartoonish style are printed onto the thin paper. When he brings his lighter to the twisted tip, the smoke he inhales is sweet.

“No desire to know why your girl thought getting fucked by me was worth breaking her promise to you?”

Taehyung leans his head against the back of the couch and watches Namjoon out of the corner of his eye. The other man sits in a chair diagonal from Taehyung’s spot on the couch. He looks odd in Taehyung’s apartment, wearing tortoise-shell geometric glasses and a cream-colored cardigan. Meanwhile, Taehyung lounges in light grey joggers and a tight white t-shirt with the sleeves cuffed around his bulging biceps.

They’re a funny sight, him and Namjoon. Taehyung is sure of it and can’t help but smirk to himself at the thought of Namjoon’s ex-girlfriend knowing he’s here. He’s sure Namjoon hasn’t mentioned it to her. As far as Taehyung knows, she hasn’t had any communication with Namjoon since she went off to California.

Taehyung knows they’re both thinking about how the last time Namjoon was here, they were beating the shit out of each other.

Taehyung also thinks about how he fucked Namjoon’s girl on the couch right where he’s sitting, but Namjoon doesn’t know that. The asshole might have his suspicions, but he can’t ever know for sure.

That is unless Taehyung tells him. And Taehyung loves it when Namjoon gets all purple in the face, and the veins pop out in his neck. But he also loves knowing what Namjoon doesn’t.

“Shut the fuck up,” Namjoon hisses. His face isn’t quite purple yet, but his neck veins are starting to show.

Taehyung’s mouth shapes into a lazy rectangular smile.

“Make me.”

“You’re so fucking childish.”

Taehyung snorts. When he exhales, smoke rushes from his nostrils. He leans one elbow on his knee and extends his other arm out to offer Namjoon the grape-flavored joint.

“I don’t smoke,” Namjoon declines with a wrinkle of his nose.

It’s ridiculous because Namjoon doesn’t like Taehyung, yet here he is in his apartment, and for what? Their meeting is under the pretense that Taehyung wanted to make amends now that the object of both of their affection is no longer in the picture. The important thing to remember about Kim Taehyung, though, is that he is always honest - you just have to decipher the meaning behind the truths he speaks.

“There’s a first time for everything, isn’t there?” Taehyung licks his lips and doesn’t miss how Namjoon follows the action with suspicion in his eyes. “C’mon, these were her favorite. S’good; it’ll make you taste like grape soda.”

Namjoon doesn’t comment on Taehyung’s implication that anyone would be tasting his mouth for proof, and Taehyung doesn’t expect him to. He waggles the joint, careful not to let any ash hit the floor.

The funny thing about Namjoon is that he thrives off of controlling the weak people he’s closest to, but he is hopeless when presented with someone just as manipulative as he is. Taehyung figures it’s his nonchalant demeanor that gets Namjoon’s panties in a twist. While Namjoon is high-strung and anxious in his desire to maintain control, Taehyung is more willing to play with his food. He likes feeling around, getting a sense of the situation. He’s willing to be patient, to wait for the opportune moment to get someone right where he wants them.

And Namjoon is nearly there.

With a grunt and an eye roll, Namjoon plucks the joint from between Taehyung’s long fingers and sticks it between his lips.

“Keep your lips tight, but not too tight,” Taehyung guides Namjoon in a soft murmur. “Inhale some air right after you take the hit, but don’t let any of the smoke out. That’s it.”

Namjoon coughs a few times, but that’s expected of a first-timer. Taehyung schools his face, careful not to have any expression that could be read as condescending. If he wants Namjoon to chill out, he needs to avoid bruising his ego. There will be plenty of opportunities for that later.

“See? Feels good,” Taehyung reassures when Namjoon passes the joint back. He has to lean across the coffee table to reach it. “Come sit over here; it’s fucking annoying having to lean like that.”

When Namjoon hesitates, Taehyung draws his lip between his teeth to hold back a grin.

“What? I don’t bite.”

“Shut up,” Namjoon immediately counters, but he gets up and sits beside Taehyung on the couch.

“Relax.” Taehyung blows a smoke ring toward the ceiling. “Ride the high.”

It’s surprisingly easy to get Namjoon to relax once he has a few more hits. Taehyung has been told he has a calming voice, so perhaps Taehyung’s random ramblings aid in getting Namjoon to feel more comfortable. He’s certainly hesitant at first, but they have enough history to fuel their conversation. It isn’t painless, but it isn’t awful. Taehyung steers clear of girlfriend-talk, instead reminiscing about stupid teachers they’d had in school and getting into an only semi-serious argument over their favorite basketball teams.

Yes, Taehyung brought Namjoon over to earn his trust because he’s playing the long game, biding his time until he can truly fuck Namjoon over, but he doesn’t expect that trust to develop so quickly. Too quickly.

“I wish I could talk to her,” Namjoon says with a sigh. He rests his head against the back of the couch and stares at the clouds of smoke they’re blowing into the air.

“Probably not a good idea, my guy,” Taehyung counters.

Namjoon turns his head to the side. He and Taehyung are only a few inches apart, close enough that their shoulders almost touch. There’s a strange look on his face that Taehyung can’t decipher because he doesn’t know Namjoon that well.

“You haven’t reached out to her?” Shock colors Namjoon’s voice and muddles his odd expression.

“Nope.” Taehyung draws out the word and lets it pop at the end.

“Why not?”

He shrugs.

Namjoon lets out a disgruntled sound like he’s frustrated that Taehyung hasn’t wanted any communication with his ex, but he has.

“What would be the point? It’s not like we had anything serious going on. Sorry, but it was a good fuck, and that’s it. And I can get a good fuck from plenty of people.”

It isn’t entirely true, but Taehyung strangles the voice inside his head that tries to point that out to him.

Sex talk must make Namjoon just as uncomfortable as it had his girlfriend because the guy practically squirms in his seat. It makes Taehyung want to roll his eyes, but he’s trying to be nice right now.

“I wouldn’t know,” Namjoon sniffs, and if he could lift his nose fully into the air, Taehyung is sure his snooty ass would.

“I know. It’s cute,” Taehyung says with a crooked grin. He brings the joint to his lips and watches Namjoon through the hazy smoke. “That you’re a virgin.”

It’s Namjoon’s turn to roll his eyes. “Shut the fuck up. Virginities mean nothing.”

“Don’t they?”

“It’s a social construct.”

Taehyung waves a hand once Namjoon takes the joint from him. “That’s all that fancy college talk,” he dismisses. “You’re telling me you don’t care about fucking for the first time? Don’t care who it’s with, when, none of that?”

Namjoon is overcome with a fit of coughs, so he shakes his head instead of verbally answering.

“Then why did you care so much about you and your girl saving yourselves for marriage?”

Namjoon sighs like Taehyung is the stupidest person in the world. It isn’t the first time. “That wasn’t about virginities. That was about not being a fucking slut like some people.”

“Like me,” Taehyung muses. Namjoon doesn’t find it to be as funny.

“Yes, like you.”

Taehyung hums in understanding, but he doesn’t speak right away. Namjoon is confusing. Abstinence before marriage implies sexual purity, yet he finds virginities to be arbitrary. Wouldn’t that make a person’s body count arbitrary, too? College kids and their stupid, contradictory ideas. Taehyung always knew college wasn’t for him, and this type of pretentious bullshit is exactly why.

“What counts as sex for you?” Taehyung leans forward to tap the joint against the edge of an ashtray.

“What do you mean?”

“Y’know, if you’re saving yourself ‘cause you wanna be a prude, how far are you willing to take it? Is a handjob considered sex? Some sloppy toppy? Where’s the line drawn?”

Namjoon grimaces at Taehyung’s crass language. “I don’t know.”

Taehyung hums again and rests the now spent joint at the bottom of the ashtray. He and Namjoon aren’t that high; another joint would be needed to really get them to the level he likes to be at. They’re buzzed, relaxed enough that they aren’t at each other’s necks, but Namjoon’s eyes aren’t even red yet.

Taehyung twists his body to face Namjoon and props his elbow on the back of the couch so he can hold his head in his hand. “So if I sucked you off right now, it wouldn’t count?”

Namjoon nearly chokes, but Taehyung keeps a straight face.

“Excuse me?”

“If I sucked you off, it wouldn’t count as sex?”

The neck veins appear now, but Taehyung thinks they aren’t out of anger. He can’t help but smirk when Namjoon’s eyes fall to his lips.

“It doesn’t matter because you wouldn’t do that.”

“Why not?” Taehyung lets himself laugh this time because it’s utterly ridiculous how Namjoon goes from calling him a slut to calling him a liar in the same breath. “Like I said before, aren’t you curious why your girlfriend cheated on you with me?”

It’s the Forbidden Topic, but Taehyung thinks right now is an appropriate time to bring it up. He wants to rile Namjoon up, but now his strategy has evolved slightly.

Before Namjoon can answer, Taehyung leans forward to rest his hand on Namjoon’s knee. He squeezes it lightly, then drags his palm up the length of Namjoon’s thigh, making sure to curve his fingertips into the inside of his thigh when he squeezes the muscle.

“Quit it,” Namjoon whispers, but Taehyung notices that he spreads his legs. The movement is almost imperceptible, but it happens.

“She always said she liked my mouth,” Taehyung ignores Namjoon, kneading his thigh as he speaks. “I could show you what’s so special about it.”

He can see it, the fight in Namjoon’s eyes. It’s in the way he looks at Taehyung’s mouth, then to his hand squeezing his thigh, and then back to his eyes. Eyes that Taehyung knows are dark and full of lust, but mostly mischief because this is a game. Fucking Namjoon’s girlfriend had been a game, too. It just hadn’t ended the way Taehyung wanted or expected it to.

“C’mon, Joonie,” Taehyung whispers. He slowly moves off the couch and sinks to his knees on the floor between Namjoon’s legs. “You’ve always wanted to shut me up, right?”

Having Taehyung between his legs must light a fire inside of Namjoon because he blinks a few times as though he’s just woken up. It’s cute how his cheeks flush a deep pink, the color intensifying as Taehyung’s long fingers begin unbuckling his belt. Taehyung wants to ruin him.

“I need you to say it,” Taehyung murmurs. Even though Namjoon willingly lifts his hips, letting Taehyung pull his jeans and underwear down to free his cock, Taehyung needs verbal confirmation. He watches Namjoon with curiosity as he brings his cock to his mouth and flicks the head with the tip of his tongue. Taehyung hasn’t sucked a dick in ages; he’s normally the one choking someone with his cock. Luckily, being out of practice won’t matter in this situation. Namjoon is already folding, and Taehyung has barely done anything.

Namjoon’s bright eyes narrow into a hateful glare. “Fuck you.”

“Oh, now we’re gonna do that?” Taehyung teases. “Let’s worry about me sucking you off, and then we can talk about fucking, okay, Joonie?”

He molds his lips around the tip, and Namjoon lets out a deep groan. He throws his head against the back of the couch and digs his fingers into his own thighs to keep himself rigid.

“Fuck, fine, do it.”

Taehyung hates when people tell him what to do, but he’ll give Namjoon a pass this time. Slipping the man’s cock down his throat is more interesting than getting into an argument. Funny how life works. He’s way too giddy with the excitement of finally getting at Kim Namjoon, the man he’s hated more than anyone else for nearly a decade.

Taking it all at once is a mistake, though. Namjoon is more tightly wound than Taehyung had anticipated. The moment his cock hits the back of Taehyung’s throat, Namjoon practically starts crying. Taehyung eases up on his approach, going slower and not applying too much pressure. He doesn’t want to be an asshole about it, he really doesn’t, but the hum he makes around Namjoon’s cock is the closest thing to laughter that he can do with a dick in his mouth. He manages maybe two bobs of his head before he has to pull off.

“Damn, Namjoon,” he huffs, voice low and thick. He rests his chin on Namjoon’s thigh and slowly drags his hand up his cock, avoiding the tip. “You’re such a virgin. It’s kinda embarrassing; I’m sorry.”

Namjoon covers his face with his hands, and Taehyung can see where his blunt nails dug half moons in his thighs. “Fuck you, Taehyung.”

“Mhm, you said that already.” Taehyung runs his tongue up his cock just to be mean, though he’s a bit afraid Namjoon might kick him from the way his body twitches. “You’re not fucking anyone with this pathetic thing.” He squeezes the base of Namjoon’s cock, also to be mean. “I’m not opposed to fucking you, though I thought you didn’t wanna be a slut.”

Taehyung expects Namjoon to cuss him out even more, but he just stares at Taehyung’s tongue as it licks around the head of his cock. Heat builds in the pit of Taehyung’s stomach, but he does his best to ignore it. He needs to stay focused on Namjoon. Namjoon, who has yet to refuse Taehyung’s offer.

With a quirk of his eyebrow, Taehyung sits back on his heels. “Unless you want it?” Silences. “Oh, you want it.” Taehyung bites his lip to suppress a grin, but the cockiness bleeds through his tone anyway. Namjoon already looks fucked out, and for once, the little bitch has nothing to say. It’s great; Namjoon deserves a taste of his own fucked up medicine for being such a controlling asshole in his last relationship.

“Alright, here’s what we’re gonna do since you’re too nervous,” Taehyung holds up his hand when Namjoon starts to protest. “I’m going to my room to get a condom and some lube. If you’re still here when I get back, I’m gonna split you open, aight, Joonie?” Taehyung pats Namjoon’s knee and stands up.

Taehyung is enjoying the fact that he rendered the man speechless a little too much. Part of him wouldn’t be surprised if Namjoon has his dick shoved in his pants and the door swinging behind him by the time Taehyung returns to the living room. It wouldn’t matter either way, he figures as he retrieves the items he needs from his bedroom nightstand. The damage is done regardless; it doesn’t matter how far they take it now. Besides, Taehyung wasn’t going to swallow, and he sure as fuck wasn’t going to let Namjoon nut on his face. He’s got more self-respect than that, wouldn’t let Namjoon have the pleasure.

To his pleasant surprise, Namjoon is right where Taehyung wants him - sitting pretty with his pants and underwear in a pile on the floor. He’s kept his t-shirt on, but the cardigan is gone and that’s just fine with Taehyung. The important parts are exposed and that’s all he can really ask for.

“Don’t fucking say anything,” Namjoon hisses but it’s whinier than it is biting.

Taehyung holds up his hands, one of them clutching the lube and a condom. “My lips are sealed, Joonie baby. Now turn around and get on your hands and knees.”

Fuck, Taehyung never could have imagined how good saying that would feel. He doesn’t even bother hiding his triumphant grin as he strips down to only his t-shirt, mirroring Namjoon.

Namjoon looks hot spread out for Taehyung on the couch. Despite his sharp tongue, the man is completely pliant for Taehyung as he massages his lubed-up fingers inside of him, one by one. It doesn’t take long for Taehyung to find Namjoon’s prostate. He pays special attention to the spot for a bit - just long enough for the burning tension to build inside of Namjoon and slowly drive him mad. But eventually, Taehyung steers clear of it despite a whine from the man spread open.

“No way I’m letting you come now,” Taehyung grunts, using his knees to push Namjoon’s legs wider apart.

It’s been a while since Taehyung has had to prep someone. Usually, when he and Jungkook fucked, Jungkook did all the work himself. Said he liked to put on a little show for Taehyung, and Taehyung isn’t ever going to deny his best friend anything.

So maybe he rushes a bit through it, making fingering less like foreplay and more like true preparation - merely a task that must be completed before they can move forward with the night. There’s no need to be sexy or passionate; Taehyung is doing this to make a point. He fucking owns Kim Namjoon’s ass.

“You ready?” Taehyung huffs, trying his best to sound as unaffected as possible while he rolls the condom on. It’s difficult to keep steady when he slowly slides his cock in between Namjoon’s ass, letting it drag up the curve. He rolls his hips forward to chase the pleasure, even if it’s minimal compared to what he’ll soon have.

“How the fuck am I supposed to know?” Namjoon bites back.

Rather than respond to his smart-ass comment, Taehyung lines his cock up and pushes through the stubborn muscles - slow enough to not hurt Namjoon too badly but fast enough to knock the air out of him.

“Oh god,” Namjoon gasps in a voice much higher-pitched than Taehyung would have expected. Taehyung lands a stinging slap on his ass.

“Don’t fucking clench,” Taehyung commands with a hiss, using both hands to spread Namjoon’s cheeks to better watch the way his cock, shiny with lube, slides further inside him.

It takes a few shallow thrusts before Namjoon lets out a broken-sounding sob and completely melts into the cushion. His body rocks forward as Taehyung deepens his strokes, pulling almost all the way out to slide back in again, angling his hips to hit Namjoon’s prostate with each stroke.

Grabbing a fistful of Namjoon’s sandy-blonde hair, Taehyung twists the man’s head to the side and pushes his upper body into the couch. When he squeezes his fist and gives a slight tug, a ragged groan rumbles from Namjoon’s chest. Taehyung already knows this isn’t going to last long. Namjoon is trembling like a leaf, and Taehyung is still going slow by his standards. It’s fine; Taehyung isn’t looking for something drawn out and sensual. He wants to fuck Namjoon hard and fast just because he wants to be able to say that he did.

“Someone likes to be manhandled, hmm?” Taehyung snickers. Without slowing the pace of his thrusts, he leans forward to press his chest against Namjoon’s back. “Can you do something for me, Joonie?”

Namjoon bites into his lip so hard the skin turns nearly white. Another tug on his hair almost forces out a moan, but he keeps his teeth clamped down to muffle the sound.

“Oh, c’mon, Joonie,” Taehyung whispers against his ear.

Taehyung’s lips brush against the curve of it before he slips his tongue out to tease the tip down to Namjoon’s earlobe. After a few flicks, he sucks it into his mouth, nibbling on it until Namjoon’s lip falls free, and a moan that sounds more like a sob escapes him. The wrecked sound makes Taehyung’s cock twitch inside him.

“Good boy.” His praise drips poison as he straightens up to kneel between Namjoon’s legs once again. He still bucks into Namjoon, but his thrusts have slowed to a relaxed, steady pace. “Now, are you going to do what I want? It’s a good thing. I promise.”

Namjoon nods as best as he can with Taehyung’s fingers still digging into his scalp.

“I want you to touch yourself.”

Namjoon lets out a whimper, but he obeys. One arm remains raised above his head, hand squeezing the arm of the couch to both ground himself and prevent his head from hitting it when Taehyung thrusts particularly hard. His other arm snakes between his body and the couch cushions.

Although Taehyung can no longer see Namjoon’s hand, he knows he’s done what he asked by the way his arm starts to shake with the effort of fisting his hand up and down his cock.

“See? That. Wasn’t. So. Bad.” Taehyung punctuates each word with a brutal thrust. He lifts Namjoon by the hair just enough to slightly elevate him from the cushions. The position allows Namjoon to rest on one elbow and jerk himself off more easily.

“Y’know, next time, I think we should invite your pretty princess over, don’t you think?” Taehyung usually isn’t the type to talk during sex, but a sick part of him enjoys how Namjoon tenses with… embarrassment? Humiliation? Something, every time Taehyung mentions his ex-girlfriend. “Could fuck her and make you watch.”

Namjoon lets out a whimper in response, and his eyes squeeze shut.

“No? Not into that?” Taehyung lets go of his hair to hook his middle and ring fingers into the corner of Namjoon’s mouth. “Of course, you’re a greedy little bitch. You can’t just sit back and watch. That’s fine. Maybe she’d like two cocks up her pussy.”

Taehyung brings a stinging slap to Namjoon’s ass. By this point, he’s drooling around his fingers.

“She’s pretty tight, though. Not sure she could handle it.”

“F-Fuck y-y-ou,” Namjooon stutters.

Taehyung is sure it’s meant to be biting, but he says it through the most debauched moan once Taehyung slips his fingers out of his mouth that all the statement does is turn Taehyung on more.

“You’re the only one getting fucked,” he points out with a grin Namjoon can only catch out of the corner of his eye.

“T-Then, d-do it, you piece of s-shit,” Namjoon says with a shallow breath.

He’s going to come soon. Taehyung can tell by the way he slumps face-first into the couch. It’s perfect timing because Taehyung’s steady pace is starting to slip. He leans forward and wraps his arm around Namjoon’s waist, batting his hand away from his cock to replace it with his own.

“Ohh f-fuck.” Namjoon’s moans are muffled by the cushion, but Taehyung’s pressed close enough against him that he can just make out the other man’s pathetic cries. “Taehyung.”

“C’mon, Joonie, that’s right.”

Namjoon’s cock is slick with precum. Taehyung pays special attention to the head, squeezing it and rolling his palm over the tip, doing his best to match his hand’s movements with the rhythm of him pounding into Namjoon. His whimpering makes every nerve ending in Taehyung’s body tingle with pleasure; he can practically see himself crackle and pop like a live wire as Namjoon falls apart under him.

“You gonna come for me, Joonie?” Taehyung digs his teeth into Namjoon’s shoulder just hard enough to make him squirm. “Come all over yourself ‘cause I fuck you so good?”

When Namjoon doesn’t respond, Taehyung slides his fist down to squeeze the base of his cock. The action makes Namjoon jolt with a cry of frustration.

“Fuck! Taehyung, fuck y-you-”

“I wanna hear you say it. Fucking say it, Joonie.” Taehyung pushes Namjoon deeper into the cushions. “Or do you want me to stop?”

“No!” It’s pathetic the way Namjoon whines. Taehyung has to bite his bottom lip and focus on the pain there to stop himself from coming.

“Then fucking say it.”

“Fuck, okay,” Namjoon is panting, and his voice wavers with each brutal thrust. “You fuck me, so, fuck, so good. Ohh, Taehyung, Taehyung, Taehyung, please.”

It only takes a few pumps before he feels Namjoon shiver and lock up beneath him, and warmth spills into the palm of Taehyung’s hand.

Knowing that he’s fucked Kim Namjoon, the man he hates most in the world, is a pleasure so deep that only sweet revenge could foster it. But knowing Kim Namjoon had moaned his name when he made him come? It’s enough to simultaneously send Taehyung over the edge and inflate his ego.

“Shit,” Taehyung curses as he comes. “Fuck.”

Slumping into Namjoon’s back, Taehyung’s weight pushes him all the way into the couch. They’re sweaty, and the cum on Taehyung’s hand is disgusting; it’s always his least favorite part about fucking guys. It’s messy and sticky, and he doesn’t know what to do aside from smearing his hand on Namjoon’s t-shirt in a poor attempt to clean himself up.

With a deep breath, Taehyung lifts himself up to a sitting position to allow Namjoon to roll onto his back. His glasses are askew, barely hanging onto his face, and his hair is a mess. He looks utterly wrecked, and Taehyung knows it’s not just his ego telling him that.

“Good?” He asks with a smirk. Namjoon’s answer won’t matter because they both know the truth.

do not copy, repost, modify, or translate any of my work

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