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Jungkook notices it about a week before Taehyung’s rut—the way he subtly becomes more possessive, more protective, wants to follow his omega around. Not that Jungkook really needs protection or Taehyung as a make-shift shadow, but it definitely appeals to his instincts. The first time he notices it, is the 20th of the month. Exactly eight days before Taehyung’s rut.
The entire pack is eating dinner at the kitchen table, and Taehyung’s scooted his chair oddly close to Jungkook’s. About halfway through the meal he puts a hand on his thigh. Jungkook’s about to elbow him in the ribcage because he’s not in the mood for getting felt up at the dinner table, but Taehyung doesn’t do anything. His hand just stays there, as if he’s trying to ground himself. And that’s when Jungkook realizes, Tae is about to start his rut.
Taehyung gets a hell of a lot more moody too. He grumbles at his pack mates more often and is increasingly irritable. Jungkook’s surprised when the pack doesn’t even blink an eye at the behavior. Hobi later informs him that all alphas tend to get bitchy around rut and this isn’t new behavior for Taehyung.
The only person Taehyung’s not annoyed with his Jungkook. In fact, Taehyung’s all over him. He’s constantly scenting him, picking him up, placing his hands on him. The closer his rut gets the more his behavior increases. Seeing as yesterday he growled at Namjoon for patting Jungkook on the back. He’s pretty sure he’s never seen Taehyung blush so hard. Namjoon takes it in stride and Taehyung profusely apologizes. Although a small, primal part of Jungkook finds it extremely appealing.
Jungkook rushes home after class. His book bag is a bit heavier than normal, but that’s because he’s been collecting next week’s work form both his and Taehyung’s professors. Of course, missing a week of classes sucks but Jungkook has more important things to attend to, like his boyfriend’s dick. Taehyung’s rut is supposed to hit tomorrow, meaning Jungkook’s an anxious mess.
Since Namjoon mentioned that Taehyung once passed out because the dumb fuck didn’t take care of himself during rut, he’s been high-strung. Even though he has a whole pack to help him he wants to take care of Taehyung himself.
When he gets home he rushes into their bedroom, finding Taehyung pacing back and forth in frustration. Jungkook shrugs off his back pack and approaches his alpha tentatively. Once he gets in Taehyung’s line of sight, the alpha’s eyes go dark and he grabs Jungkook by the back of the neck and shoves him over the edge of the desk. Jungkook gasps in surprise. For a brief moment he wonders if Taehyung’s rut has started, but he knows that can’t be the case; he would’ve been able to smell it. Suddenly Taehyung’s biting down hard on the side of his neck, hard enough to draw blood. He cries out, pushes back against Taehyung, but his alpha has a strong hand on the middle of his shoulder blades.
“Omega, where were you?” he growls.
“I was at school, you dumb fuck, snap out of it!” Jungkook fusses. If he really wanted to, he probably could’ve gotten out of Taehyung’s hold, but possibly injuring himself and or his boyfriend really isn’t something he wants to do.
Jungkook finally gets out of Taehyung’s grasp and turns around.
“Taehyung what’s wrong?” the omega asks.
Taehyung holds him close. “Just scared, Jungkook. As much as I want to tell myself this will be sweet and meaningful, it’s not gonna be. It’s gonna be rough,” he warns. Jungkook kisses Taehyung’s fingertips.
“Well, I like it rough.” “No, like more rough than I’ve ever been,” he reiterates.
“I might...I might also say some horrible stuff to you.”
Jungkook frowns. “What do you mean?”
Taehyung sighs. “Like I might say some really degrading shit, just please promise me you won’t take any of it to heart?”
Jungkook cuddles closer. “I promise, Alpha.”
“Alright, we need to get ready for bed, baby, tomorrow will be tiring,” Taehyung says softly.
Jungkook nods and slips out of bed to start his nightly routine. He can’t stop thinking about Taehyung’s warning.
I might say some really degrading shit.
Jungkook wonders what exactly that entails.
Jungkook wakes up as he’s shoved onto his front and his shorts are ripped off his legs. “Taehyung, what’s—“ he’s cut off abruptly by the feeling of Taehyung’s thick cock splitting him open.
He gets a whiff of Taehyung’s scent and pliantly melts into the mattress, it’s absolutely overwhelming. He hadn’t even noticed how wet he’d gotten in his sleep. His thighs are completely drenched in slick. He can barely see Taehyung in the dim morning light, even less so when the alpha grabs a fistful of Jungkook’s hair and shoves his face into the mattress.
“Taehyung?” he says in a small voice, reaching backwards to feel his mate, but that arm is quickly bent behind him and held down firmly.
Jungkook whimpers at the display of dominance, more slick leaking down his thighs. Without warning, Taehyung pushes his cock all the way in with one smooth motion. Jungkook cries as he bottoms out. He feels like the breath is knocked out of him. They haven’t had sex in a week and Jungkook’s significantly tighter than usual. The stretch is almost painful and Jungkook clenches around him as he feels like he’s being split in two. Taehyung’s cock feels so much bigger than usual and Jungkook feels like his organs are being rearranged.
“Alpha,” he whimpers when Taehyung immediately starts a brutal pace, allotting him no time to adjust.
“What, slut? I don’t remember asking my fuck-toy to talk,” he growls out.
Jungkook gasps, Taehyung’s never talked so harshly to him before. Although he’s more surprised at himself for how hot he finds it. Every part of himself is telling him that this is what’s right—submitting and being owned by his alpha. After that first sentence slips from his mouth, Taehyung’s talking a mile a minute.
“God, look how you just take what I’m giving to you,” he says, “open up so easily for me.”
Jungkook mewls and brings a hand down to his stomach to feel the bulge that appears each time Taehyung fucks into him. When he notices what Jungkook’s doing he laughs.
“God, cock hungry little slut, you like how good your alpha fucks you? Like that you’re stuffed full?”
Jungkook sobs and arches his back. “It’s so deep, so deep, can feel it in my stomach.”
Taehyung presses down harder on his shoulder blades, snapping his hips forward with sharp, meaningful thrusts. Jungkook shudders when his cock grazes his prostate.
“It’s all you’re good for,” Taehyung taunts, “just a cockwarmer for me to fuck my come into.”
Jungkook clenches down hard on Taehyung as he processes those words. Immediately he’s coming onto his chest, completely untouched. He can’t tell if it’s his instincts that are reacting so well to Taehyung’s behavior or if he’s really just that desperate of a person. Regardless, Jungkook’s pretty sure he’s never come that fast before. Taehyung chuckles.“What? That get you worked up, baby?”
Jungkook nods and Taehyung takes the hand out his hair to spread his cheeks. He teasingly runs his thumb over Jungkook’s rim. Jungkook takes the opportunity to turn his head and look back at Taehyung. His eyes look glazed over and he’s staring so intently at where they’re connected that Jungkook wants to blush.
He catches Jungkook’s eyes and gives him a downright predatory grin. He leans forward so his lips are next to Jungkook’s cheek.
“I’m gonna have you so full you won’t be able to move, Omega, filled up all the way with my come.”
Jungkook moans and a particularly heavy rush of slick runs down his thighs.
“God, you’re so fucking wet and you’re not even in heat. Does having your alpha fuck you hard get you wet, baby?” he teases.
“Yes, feels—ah, ah, ah—feels so good, Alpha,” Jungkook whispers into the sheets.
Taehyung’s thrusts become slightly sloppy and Jungkook knows he’s close. He pushes his hips back into Taehyung.
“Gonna knot me, Alpha? Keep me nice and full?”
Taehyung growls and the harshness of his thrusts somehow increase. Jungkook feels the beginning of his knot catch at his rim and mewls in delight. It’s seconds later that Taehyung’s forcing his knot into Jungkook’s hole, and coming inside him. He leans down and bites the back of Jungkook’s neck hard as he empties his come into him.
Jungkook gasps loudly and melts into the bed. He knew Taehyung grabbing the nape of his neck made him pliant, but biting it apparently makes Jungkook limp. His head is suddenly clouded with pure endorphins and he hums happily as he rubs a hand over his bulging stomach, now full of come.
He starts to purr in satisfaction, but hisses in sensitivity as Taehyung continues to grind into his ass, rubbing against his prostate.
“Ah! Alpha, too much, too much,” he whines, fresh tears pricking at the corners of his eyes.
The overstimulation is overwhelming, but the way Taehyung is carelessly using his body for his own pleasure has him hard again. Suddenly Taehyung’s reaching around and pressing down harshly on his own cock through Jungkook’s stomach. They both moan at the sensation which causes Taehyung to come again.
Jungkook feels dizzy with another load pumped into him and easily finishes onto his chest for a second time as he’s further filled up. Luckily after that Taehyung lets them rest, easily rolling them onto their sides. He holds Jungkook closer to his chest than normal, hand curling protectively over his omega’s stomach.
Feeling incredibly safe in his mate’s arms, Jungkook promptly passes the fuck out.