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Become Mine (I'm Already Yours)

Summary:

Kenma just broke up with his boyfriend and calls Kuroo for support. Of course, Kuroo doesn't think twice about it and makes his way towards Kenma's place, armed with booze and snacks. Soon they get more than a little tipsy and things start to heat up, in more than one way.

Notes:

This was originally a threadfic here.

Enjoy!

(See the end of the work for more notes.)

Work Text:

Kuroo gets ready in record time and locks his apartment door before leaving for Kenma's house. His friend called him to tell him that he just broke up with the alpha he had been seeing for some weeks, it was the third one in the past few months. Kenma had also asked him if he wanted to hang out and have a few drinks at his home and of course, Kuroo accepted in an instant, he had to be there for his friend as support during this tough time!

He takes a quick trip to the convenience store to buy some beer and snacks then makes his way to Kenma's where he greets him with a big hug, releasing soothing pheromones to cheer him up. He can feel Kenma releasing his own pheromones almost immediately, signaling he's feeling comfortable and relaxed.

They set things up on the table and sit down. It isn't long before empty cans of beer start to appear all over.

"So how are things going with you? Can't be worse than how mine went", Kenma chuckles dryly and takes a big gulp of his third can of beer.

"Haha, it's fine, I mean sometimes we argue but that's normal, you know", Kuroo matches Kenma and also drinks quite a bit of his own beer.

"Yeah? What about? Hopefully not about the same things I did", Kenma downs the rest of the beer and immediately opens another one.

"What was it? Didn't let you play until 4 am on a weekday?", Kuroo smirks and finishes his beer too then opens a new one as well.

"Couldn't use his dick right, alphas are sooo useless sometimes, you know", Kenma rolls his eyes and looks at Kuroo with a playful smile.

"Whaat? You can't generalize Kenma, I know how to use mine!", Kuroo reacts dramatically, offended.

"Yeah, yeaah, I heard that before", Kenma drinks more beer, his fourth can almost empty. 

He scoots over to Kuroo, "You can tell me the truth, Kuro. Having problems in bed too? Are all alphas like this?", Kenma teases.

Kuroo drinks all of his beer in one go and crushes the can with his hand.

"I'm not like your loser ex, Kenmaa", he gets all up on Kenma's face, a drunk smile plastered on his lips. He's definitely feeling the effects of the alcohol and his words are coming out a little slurred now.

Kenma drinks the rest of his can, opens a new one and drinks half of it in an instant.

"Yeaah? Then whyy do you fight with your girlfriend, uhh? Can't pop a knot?", Kenma laughs at Kuroo, mocking him. He is definitely more than a little tipsy now.

"Youu little-", Kuroo tackles Kenma on the floor and begins to tickle him all over.

"You take that back, Kenmaa. I know how to fuckk", he defends his pride while still attacking Kenma who squirms and tries not to laugh but it's impossible, Kuroo's tickle attack is relentless.

"I- I give up! Okayy, stop, pleasee", Kenma begs as little tears form in his eyes. His laughter resounds in the room, causing Kuroo to join in as well.

Thankfully, Kuroo does stop after a while, feeling accomplished after hearing Kenma's pleas.

They catch their breaths for a bit from the fit of laughter they just experienced. Kuroo looks at Kenma who's being caged under him, he can see him panting with rosy cheeks. He feels a rumble in his chest at the sight.

"Noww, that's a good omegaa", he smirks, content.

"Yeaah? I'm a good omegaa?", Kenma's eyes are fixed on Kuroo's. The tone he uses is a mix of innocence and something else underneath that Kuroo can't quite pinpoint.

He can smell Kenma's sweet warm scent deepen, even if only slightly, since he can tell the scent is quite muffled to begin with, Kenma's probably wearing a scent blocking patch though Kuroo doesn't know why he would be doing that, he never did it when it was just the two of them…unless…

Kuroo feels a little funny. What was he thinking about?

Oh, Kenma is looking at him. Kuroo knows that look, he has seen it in other omegas that he's been with. It's the one that silently screams for approval, for praise, for care.

"Yeah...youu are", Kuroo's eyes and tone soften. He must be still feeling the effects of the alcohol, that must be the reason for that funny feeling he can't quite shake off. His mind is becoming fuzzy too.

There's a beat of silence where only their shallow breaths are audible until Kenma breaks it.

"Better than youur girlfrieend?", Kenma asks. His tongue is sharp, but his eyes hold a vulnerability that can't be ignored, as if he laid one of his biggest insecurities bare.

"K-Ken-", Kuroo is taken aback, he doesn't know how to reply, but he doesn't need to as his response is cut short.

"Maybe I wass wrong, maybee…maybe she's the problemm", any semblance of innocence has left Kenma's words completely, instead there's only an edge to them now, one that's making Kuroo's heart race.

"Maybe you haven't had a good omega yet...alpha", the last word makes Kuroo instinctively growl low. He wants to hear Kenma say it again and he can't even begin to think why as his mind becomes more and more foggy.

Kenma holds back a whimper that tries to escape, in response to Kuroo's growl, before reaching behind his neck and ripping off the scent blocking patch he had been wearing. The room is instantly filled with the warmth of his scent in a moment and Kuroo finds himself inhaling deeply, almost like he needs to fill his lungs with it to keep on living.

"Kenma...Kenmaa, y-you", Kuroo leans down closer to Kenma's neck but doesn't go all in, just yet. He's feeling very dizzy now, like he drank twice the amount he actually did.

Was Kenma's scent always this sweet and warm?

"Sorryy, forgot to tell you my heat waas coming, is that baad?", Kenma cups Kuroo's face with both hands. He's also feeling it, being attacked by Kuroo's alpha pheromones reacting to his omega scent at its peak.

"Won't youu help an omegaa in need? Or want mee to go find myy ex?", Kenma asks, sweetness laced with a taunt.

Kuroo growls, this time to deliver a warning. He's been overtaken by his instincts almost completely. 

Did his omega really mention another alpha in his presence? 

Is his omega going to seek another alpha to fuck him and tell him about it?

He needs to be taught who he belongs to.

"Alphaa, wannaa be breed, won't youu breed me? Want youur pupss", Kenma isn't deterred by Kuroo's warning and keeps on pushing his buttons, his judgment almost non existent now.

Is it dangerous to rile Kuroo in such a state? Maybe.

Does he want the consequences of doing it? Absolutely yes.

Kuroo's pupils dilate, his fangs come out, he growls, is an angry sound that makes Kenma smile such a big smile that it almost reaches his ears, as his hole twitches with excitement, producing slick.

Next thing, he's being flipped on his belly, sweatpants and underwear pulled down in one tug with such strength that they almost rip apart.

Kenma gasps as the cool air hits his exposed skin, “K-Kuro-”, there's a bit of fear settling in his gut mixed with expectation. He has never been treated so roughly by Kuroo or anyone for that matter.

Kuroo makes Kenma present himself, putting his ass up high for Kuroo to have better access to his slicked up hole. He spreads Kenma's asscheeks making his once tiny entrance stretch under his gaze as more slick drips down Kenma's small balls and begins to pool on the floor underneath.

"Good omega, all ready to be taken, look at all that slick", he licks a stripe up Kenma's hole and it's the most delicious thing Kuroo has ever tasted.

"You taste soo good, Kenmaa. Onlyy for me", Kuroo licks his lips, eyes lidded.

"Alpha, pleasee", Kenma tries to wiggle his ass in an attempt to entice Kuroo, even though Kuroo's strong grip makes it very hard.

"Suuch a good omegaa", Kuroo takes his cock out and starts to stroke it while pressing the tip over Kenma's gaping hole.

Kenma shivers at the anticipation, though lucky for him, he doesn't have to wait much at all because Kuroo is already halfway in while Kenma's brain is still trying to catch up to what's happening.

"Fuuck, K-Kuro, a-alpha...alpha, breed me, breed mee", Kenma's a babbling mess and he hasn't been properly fucked yet. Kuroo is so big, he knew he was, but didn't know it would be like this, he's stretching him so much.

Kuroo bottoms out, his whole length inside Kenma. He breathes heavily, his fingers digging into the flesh of Kenma's ass, staring at how well his omega is taking him.

“Good…omegaa…”, Kuroo mumbles.

"Ku-Kur- Nnghh!", Kenma yelps as Kuroo holds his head down against the floor and thrusts full force into him.

There's no time to waste. Slapping sounds fill the room along with Kenma's moans and incoherent pleas. Both of their scents are intermingling in the environment and fueling each other's desires.

"Is thiss...good enoough...for youu…omega?", Kuroo asks as his cock slams in and out Kenma's hole, the copious amounts of slick making it easy to do so.

Kenma doesn't reply, he just whimpers in full submission. His face is still pressed against the floor and tears are pouring out.

"Ngghh nghh I'm- I'm sorryy alphaa I'm sorryy please ohhh I'm sorryyy", Kenma's orgasm sneaks up on him, he shoots his sperm on the floor as Kuroo continues fucking his tightening hole hard.

His neglected small cute cock is all limp in between his legs now, making a mess onto the surface beneath him.

"Need...to teach youu...a lessoon", Kuroo pushes his cock in all the way to the base causing a dazed Kenma to roll his eyes back at the feeling of being full of his alpha's huge dick.

"Alp-alphaa", Kenma slurs, his walls pulsating around Kuroo's cock, they want to milk him.

Kuroo leans down and grabs Kenma's face with one hand then turns it around towards him and kisses him. It's surprisingly slow compared to how he was ramming Kenma before, like he's savoring him.

Kuroo pulls away leaving Kenma with his mouth open, tongue sticking out as if asking for more. The sight makes Kuroo's cock throb. His omega is so needy and adorable, but even his perfect omega needs to be taught proper manners, no making fun or teasing his alpha and specially, no mentioning other alphas.

Kuroo nuzzles Kenma's neck as he begins to thrust again, just shallow movements that aren't enough for Kenma who wants to be pounded and used by his alpha like the good omega he is.

"Soo well behaved, all mine, my omegaa", Kuroo praises and begins to lick Kenma's neck.

"Nnnghh, ahh, Kuro", Kenma moans, "B-better than youur girlfriend?", he asks, his voice a little shaky.

"Who?", there's no emotion in Kuroo's voice. He doesn't spare the question more than a second as he continues to lick Kenma's scent gland, continues fucking him, picking up the pace. Kenma smiles as his hole clenches hard all around Kuroo's cock, not wanting to ever let go.

"F-fuck, omega, Kenmaa...", Kuroo's thrusts become more erratic by the second.

"D-don't want another a-alphaa", Kenma whimpers, "Pleasee, I'm y-yours", he wants to please his alpha, he wants to be his and only his.

"That's right, Kenma, you're minee, you're mine, my omegaa", Kuroo chants as he licks Kenma's scent gland desperately, balls slapping against Kenma's ass.

Kenma can feel Kuroo's knot inflating already. He's ready, he's been ready for a long time. 

Finally, it's here.

Kenma feels a sharp sting on his scent gland and little drops of blood rolling down the side of his neck as well as a fullness he's never felt before, as if he's complete now, before Kuroo's knot pops, stretching him, and effectively locking all the hot cum inside.

Kenma squirms, he's feeling so overwhelmed, he feels like escaping, but Kuroo holds him in place without much effort as he keeps on chomping down on his neck, waiting for every last drop of sperm to be safely deposited inside Kenma.

His omega asked for pups so he has to deliver, right?

Once Kuroo's been thoroughly milked, he lets go of Kenma's marred neck. He takes a moment to admire his work and gives it a few soothing licks.

"K-Kuro...", Kenma whispers, his eyes closed, feeling blissful and extremely tired.

"Don't worryy, omega, I'll take care of youu", Kuroo kisses Kenma's newly made mating mark.

Nothing can separate them now.

Nothing WILL separate them now.

All Kuroo will ever think about from now on is his omega, Kenma. All Kenma will allow Kuroo to think about is him. No lousy omegas will get in the way anymore.

 

"Hello?", a woman answers the phone.

"Nnghh, ahhh, Kuro, more, deeper, alpha", Kenma moans loudly, he seems to be enjoying himself.

"Kenma, omega, Kenma", Kuroo babbles.

Kuroo is laying on the floor as Kenma rides his cock for the 10th time, squelching sounds resonating in the room and into the phone as well.

"W-what the-...Tetsu, is that you?!", the woman yells, horrified.

"Alpha, they're talking to you, ohh, bet-better answer back", Kenma laughs softly while still bouncing on Kuroo's dick.

"Who's that…", Kuroo mumbles, hands gripping Kenma's thighs as his large sensitive cock is repeatedly squeezed by Kenma's warm and sticky walls.

Kenma laughs and laughs and laughs, picking up speed, fucking himself on Kuroo's length.

"You heard that? He doesn't even recognize you! He's mine now, MY alpha, MINE", Kenma leans down and cups Kuroo's face with both hands, kissing him lovingly.

"Right, Kuro?", he smiles against Kuroo's lips.

"Kenma", Kuroo's brain is fried, his head in the clouds but the smile he gives Kenma is full of true love.

"AAAAAAHHHH!!", the woman screams.

"So noisy, shut up", Kenma hangs up, throws the phone somewhere and kisses Kuroo on the lips again.

"Let's continue, Kuro", he whispers and starts moving again. Kuroo's cock still fully erect and ready to be used by Kenma.

"Yes", is all Kuroo replies as he lets Kenma do as he pleases like the good alpha he is, only for Kenma.

Notes:

Thank you for reading! I hope you liked it. Kudos and comments are always appreciated.