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nothing is guaranteed, except that you'll be mine

Summary:

ran and rindou haitani both knew they'd be alphas one day, until ran went through his first rut and decided that his little brother was going to be an omega instead

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blurb written and sent to a friend of mine because i cant stop thinking about the haitani brothers !! also not a full length fic, just the general ideas written out i just didn't have anywhere else to put this !! please please please mind the tags omg

Notes:

third warning !!! mind the tags mind the tags mind the tags !!!! its soooo important that ya'll read through the tags

Work Text:

the haitani brothers came from a long line of alpha men - even from childhood, both of them were told that they'd be alphas, and neither one questioned it. they even did those stupid tests to predict what they were going to present and when. ran, being the older brother, was going to present somewhere around in the spring right after his 14th birthday, while rindou was going to present a year later in the summertime.

sure, sometimes ran would make a joke here and there about how rindou was too needy to be an alpha, cooing over how rindou always needs his big brother there to take care of him, a role that ran always happily fulfills. but they were still going to be alphas at the end of the day, so rindou really didn't take any of his older brother's words to heart. the closer may gets, the more excited ran gets, until it's his birthday !!

may 26th comes around, and obviously its just him and rindou at this point in some shitty little apartment that they're paying for with the money they make beating up whoever comes into their pathways. rindou asks him what he wants for his birthday, and ran tells him that all he would like would a lazy day in. no going outside, nothing really planned. rindou loves being outside, and he loves causing problems on purpose, while ran is more subdued and calm, but it's ran's birthday today, so who is rindou to deny him ?

the two of them get comfortable on top of their dirty mattress that doesn't have any sheets or pillows, just a thin little blanket around them, and rindou finds himself falling asleep in his brother's arms, and assumed that ran did, too.

when he wakes up, its only because he feels something hard pressing against him, and ran is panting into his ear, mumbling and growling something about not being able to wait any longer for rindou to wake up. he was going to have his little omega, and he was going to have him now. rindou's been so, so good to him so far, he can be good for his older brother just for a little while longer. it's not a question or a demand, he says it like its a fact. that rindou will be good for him.

rindou jolts up and struggles against ran's grip, and he tries to reason with him, but he can see that there's something wrong with him. his eyes are unfocused, and he's drooling. his normally calm and nonreactive brother is now a panting, feral mess. for a second, rindou swears he smells the heady scent of dew and... fresh blood..? but it goes always relatively quickly, before rindou even gets to process it.

ran isn't really making sense - talking about how rindou was always meant for him, and that their stupid fucking parents were wrong. there was no way that rindou was going to be an alpha, because rindou was going to be ran's omega. he was going to fill his brother enough times to make sure that his body knew that he was going to be an omega, before he even presented. he figured if he could keep going through his entire rut, then there was no way that rindou would ever be an alpha. he didn't care what that meant, and he sure as fuck wasn't really thinking. he was going to have his little brother and there was nothing that anyone, not even rindou, could do about it.

none of this makes any sense to rindou, because as far as he's concerned, you can't change someone's secondary gender, it was just something that happened, but he wasn't sure he wanted to test that theory, either. somehow, he manages to wriggle away from ran's grip, he immediately bolts for the bedroom door, just to find that it's locked, and by now, ran's getting up. he, as quick as possible, unlocks the door, and he just knows that the front door is locked, too. so he doesn't even try it.

he's got a limited time before his brother is up, so he does what anyone in his position does, he hides. he figures it would work because its not like he has a scent that ran can smell, he hasn't present yet, and he would be an alpha, anyways, definitely not an omega with a scent that ran could smell.

there's not a lot of places for him to hide, but rindou's got a dj set up that he got for himself, and there's a little space in between the two stands were he could probably squeeze his body. it helps that rindou is more flexible, and even though that space was a little too small for him, he squeezes in anyways.

with his hand over his mouth, it's just a waiting game. he does his best to stay quiet as he hears rustling from the bedroom, and the heavy footsteps of his older brother as he walks through the hallway to get to him. it's almost deafening how loud his footsteps are, and rindou is just hoping and praying that in ran's haze, he wouldn't be able to find him.

its a few minutes before he gets another whiff of the scent of fresh blood and morning dew, and it momentarily stuns him. it was in the middle of the night, and he knew for sure that neither he nor ran were bleeding. but it disappears as he stops hearing any footsteps, and he thinks he's safe.

he is not.

without any warning, the entire set - table, the attached speakers, and everything - is thrown back, leaving rindou cowering behind nothing.

of course, ran loves his brother, he wouldn't hurt him without any reason, but he's not against using force, either, especially when it's something as important as this. rindou is pinned down against the cold tiled floor within minutes, and there's no way rindou is ever strong enough to beat ran, even with both of them at normal levels. clothes are ripped, literally torn off into just tatters, with ran's hand holding onto rindou's stupid top knot, nails digging into his scalp harshly.

rindou is panicking, and he's panicking badly. he doesn't know what to do, none of his words are getting through to his feral brother, and he keeps smelling blood and dew, and it doesn't make any sense. its such a strong scent that it makes his head hurt so badly, and what feels like struggling against his brother with all of his strength is just a weak little protest against him. he's drooling against the tiles, begging ran not to do this, that he's wrong about him, that rindou is going to be an alpha, that he should at least be gentle with rindou.

he doesn't even recognize the words that came out of his mouth before ran's already pushed inside. he's a little confused because he was sure that ran hadn't used any lube, and it only really hurt in the first few moments. now it feels good, really, really good. even the grip on his hair starts to feel good, and rindou suddenly can't think at all.

he didn't want this, he was sure about it. but the words coming out of his mouth, or, really, what sort of sounds like words, say a different story. a mix of ' please ' ' no ' ' gentle ' and ' more ' all tumbling from his drooling lips, and rindou is no longer really in control of his own body. he's crying and drooling and whimpering and trying to fight back all at the same time, and it's really not working. he starts to feel like he's not even really trying to fight back at all, and that thought, as bleary and unfocused as it was, bothers him a little bit.

it's not until he starts to feel something swell inside of him that the feeling of panic and the overwhelming feeling of pleasure start to fight against each other. ran says something - something about how good rindou smells, how his scent is a satiny mix of ash and bellflowers, an odd mix of stereotypical alpha scents and stereotypical omega scents.

the last coherent thought that rindou has is why ? if his scent has bellflowers in it, why doesn't ran's scent smell like orchids ? why does ran smell like blood and not the beautiful flowers that he's named after ?

he passes out soon after that thought, or at least, he's no longer conscious. his body does not stop even after that. he's both painfully aware of what's going on and yet unaware at the same time. he's moaning, he feels good, he's begging for more, begging for ran's knot again. he's not sure what's gotten into him, or what's happening anymore. but he doesn't have it in him to beg for ran to stop anymore, instead he finds himself asking his older brother to keep going.

rindou wakes up cradled against his brother, held like something precious to him. he hurts, everywhere, and he's pretty sure he's bleeding in more than one place now, or at least, it smells like it. he smells blood all over him, all around him. it's a disgusting smell, one that makes his nose scrunch up and his bloated and painful stomach twist in knots.

ran doesn't seem to notice, or at least, he makes no mention of it. he tells him it's been two days, and that he was hoping that rindou would come to reality soon. it's an important day today !! both brothers presented on the same day, because of course they would, they shared everything together. ran is an alpha, of course. rindou is afraid to ask what he is, but they both know.

it's not spoken about, just how rindou presented, but neither one really has to talk about it. they both know, and they both have clearly different feelings about it. ran is ecstatic, he's always thought rindou would be a cute omega, although he's not necessarily a stereotypical omega. but that's okay, because he's the perfect omega for his older brother.

rindou can really only seem to be angry at the fact that his first time wasn't really all that special, he can't find it in him to be angry at ran, for some reason, like something inside of him is holding him back from being angry at ran. and he thinks it's probably better not to dwell on it, so he doesn't think about it anymore. he just closes his eyes and breathes in the overwhelming and putrid scent of his older brother, a scent that he would grow to love as the years pass.