tw: noncon, blood, piss

third year midoriya and bakugou are strong alphas both borderline obsessed with omega kirishima. the only difference is that bakugou’s in love with kirishima, and midoriya’s essentially a full yandere

he can see the way bakugou scents eijirou, and the way he reciprocates. he knows ei would be his if he wasn’t wrapped up in kacchan’s web, he just needs to break that hold.

it’s kind of disgusting, having to do what he does to get the materials he needs for his plan, but he’ll touch a drugged kacchan a thousand times if it means he can get eijirou.

ei is strong, he knows that, but all it takes is one prick with a quirk nullifying bullet they confiscated years ago that midoriya kept, and eijirou is essentially defenseless.

defenseless when he’s shoved into a dark alley on ground beta and raped by a masked alpha. midoriya hates hearing him screaming and crying while he fucks the sweet omega, but he /has/ to do this. even though he hates hitting that beautiful face, it’s necessary.

he especially needs to follow through with the last part, where he uses a large syringe to pump an excessive amount of kacchan’s come, through a hollowed out dildo, into the sobbing omega when he’s too out of it to tell the difference between the dildo and his dick.

he feels bad about leaving eijirou there, bleeding and crying on the ground, nearly unconscious, but he has to be as cruel as possible if this is going to work. that’s what he tells himself when he forces ei’s mouth open to come, and piss down his warm throat.

he holds his pretty lips shut until he has to swallow it all, in between gags. he still looks pretty, all ruined and hopeless. midoriya knows he’ll be strong enough to get that lovable light back in his eyes, even if it’s completely gone right now.

“Why are you doing this? What did I do to you?”

he sounds so pitiful izuku almost feels guilty, but he just remembers why he’s doing this. he kicks eijirou on the ground a few more times before leaving. now he just has to wait.

—

midoriya isn’t surprised when kirishima comes limping back to the dorms six hours later, and bakugou is immediately in his space and catches him when eijirou collapses. izuku can’t be bothered by that right now, he’s being patient.

“Ei, what the fuck happened?! Who did this? I’ll fucking kill-“

“Nobody did this. Don’t worry Kat, I just got a little carried away when I was training. I’m alright.”

things are going according to plan so far.

“That’s not what this fucking looks like, Eijirou.”

izuku can see kacchan gently running his thumb over the dark hickeys on kirishima’s neck.

“I’m fine, can you please just help me to the showers?”

“Hell no, I’m taking you to recovery girl and she’ll-“

“No! Please, I don’t want anyone to see me like this. I just wanna sleep, Katsuki. Please.”

midoriya can tell he’s crying even though he can’t fully see his face. but he can’t move and risk them seeing him, so this angle will have to do.

he knows kacchan’s probably angrier than he’s ever been, but really, who can say no to a teary kirishima? not him. just as izuku expected.

—

for the first time since he’s met the redhead, midoriya is happy to see he’s not in class the next morning. he knew eijirou’s heat was coming up. it’s only confirmed when bakugou comes in and tells aizawa ei’s sick.

he doesn’t miss how on edge kacchan is, or the way he’s eying every alpha with suspicion. he almost laughs when kacchan stares at him with something akin to realization.

it doesn’t matter what he thinks he knows, there’s no way anyone would believe bakugou over midoriya, and kirishima doesn’t even want to tell anyone what happened.

—
he’s happy to see eijirou smiling again around a month later, but he’s also glad there are still times he’s jumpy or zoned out with a hurt look on his face. the worse it affected him, the better the plan will work.

midoriya nearly punches a wall every time he sees eijirou with kacchan. they make it obvious they have been together a while, but kacchan’s gotten so overly possessive it makes him sick.

the way he kisses him in front of everyone, and rests his hand on the small of eijirou’s back, and makes sure to leave enough marks that it’s easy to see that he’s taken.

he gets some satisfaction in how upset kacchan looks when izuku is around his boyfriend, but it’s obvious eijirou doesn’t share whatever suspicions bakugou has.

“How young is too young to mate, do you think?”

midoriya nearly snaps his pencil in half.

“Why are you asking?”

“Oh no serious reason, just me and Katsuki have been talking about it a little.”

he hates the affectionate look eijirou gets when talking about him, but he reminds himself it’s only temporary.

“I think it’s crazy to get mated before you’re even out of high school.”

“Yeah, you’re probably right.”

the sad look on kirishima’s face is upsetting, but it’s fine.

perfectly fine, considering his scent is already growing sweeter.

—
it’s a little over two months after that night when eijirou stays home from class again because he’s “sick”. izuku is nearly giddy when kacchan comes in looking like he’s ready to kill.

he’s walking back to the dorms with a smile on his face when bakugou shoves him into the side of the building.

“I know you fucking did this.”

“I don’t know what you’re talking about, Kacchan.”

“Don’t play stupid with me, I know you’re the one who hurt him.”

“Hurt who?”

he barely avoids an explosion aimed at his head.

“I don’t fucking care if Eijirou doesn’t believe it, I know it was you, and I’ll be able to fucking prove it.”

“I didn’t hurt anyone, but how will you prove it?”

he gives bakugou a smirk that says he knows exactly how and he sees his red eyes staring to water.

“You’re dead.”

he shoves midoriya weaker than before and stomps into the building rubbing his eyes.

izuku is elated. he had his suspicions that his plan worked, but kacchan just confirmed it.

kirishima eijirou is pregnant.

-
midoriya grows to hate bakugou more and more over the months. he’s just rubbing it in that he’s still with eijirou, even when the redhead is depressed and pregnant.

he massages his aching tits in the common room, he kisses and rubs his rounding belly, he holds him especially close when he’s having a rough time dealing with the fact he’s carrying his rapists baby. or at least thinks he is.

their class is overly supportive, and it isn’t hard for izuku to make his place as eijirou’s main confidant.

“Can I tell you something?”

“Of course, Kirishima!”

is he going to tell him about the assault? that could be a perfect opportunity to become his shoulder to cry on, and that will only bring them closer once the baby is born.

izuku has to work to keep from grinning, but it suddenly gets very easy when eijirou pulls his shirt collar to the side with a soft smile.

“Katsuki and I mated.”

“I told you that was stupid!”

“What? But-“

“You’re both too young for mating!”

“Dude! I’m too young to be pregnant but here I am! I thought you’d be happy for us, this is what I wanted.”

midoriya is pissed as kirishima leaves the room in a huff. this is not what’s supposed to happen. but, kacchan did this on purpose. he wouldn’t have claimed eijirou if he didn’t feel threatened by izuku.

matings can be reversed. this mating can be reversed. it /will/ be reversed. kirishima is meant to be his mate, not bakugou’s.

he needs to apologize to eijirou, but he knows he can say he was just surprised and that will be enough. kirishima is so trusting, but unfortunately, that will probably go away soon enough.

—-
eijirou is round as a basketball and everyone in their “pack” is even more overly protective of him, so it’s easy to pretend he wants to be around him constantly because he’s concerned.

his due date is quickly approaching and the only thing that’s interfered with midoriya’s plan is that stupid bite. but other than that, all is going smoothly.

when eijirou’s water breaks, izuku gets to the hospital minutes later. he doesn’t want to waste a second that he could be comforting a heartbroken kirishima.

midoriya knows his plan worked the second he enters the hospital room a short while after he’s given birth.

there’s no kacchan in sight, and eijirou is sobbing over a blond haired, red eyed little boy.

“Kirishima, what happened?”

don’t smile don’t smile don’t smile

“My baby, he’s-“

he cuts himself off with more crying.

this is perfect. he wasn’t sure the kid would even resemble kacchan very well but it’s practically his clone.

“W-We’re getting a DNA test.”

holy fuck this just keeps getting better.

“What? But isn’t the baby Kacchan’s?”

eijirou hiccups a few times before calming down enough to respond.

“I think he is.”

“I’m confused, Kirishima, isn’t that a good thing?”

not smiling is so difficult right now, even though he hates seeing eijirou sad.

“No, it’s- can I trust you, Izuku?”

oh god he nearly just came in his pants. eijirou’s going to tell him, and even better, he called him izuku.

“Of course, you can always trust me.”

kirishima takes a while to calm down enough to start talking.

“I was.. assaulted, before I- that’s how I got pregnant.”

he’s back to crying and midoriya’s feigning shock.

“Eijirou, I’m so sorry! That’s terrible. Wait, but if you think Kacchan’s the father..”

“I don’t know what to think! This is a nightmare, at least my moms are on their way.”

“Oh, actually, I couldn’t get a hold of them to let them know. I’ll try again soon though!”

“W-What? I need my moms.”

he curls around the baby in a way that makes him look so much smaller than he is. it’s so sad to see him this upset, but..

“I don’t want you to be alone, I’ll stay with you tonight. If you’re okay with it of course!”

“That’d be nice.. thanks Izuku.”

—
kirishima falls asleep soon after and a nurse comes in to take the baby. he’s glad, eijirou needs his sleep. he looks so pretty when he sleeps.

midoriya knows he’s fully out when he’s snoring softly and izuku can’t resist the temptation to press their lips together.

even when he had him in the alley, he didn’t kiss him. he wanted to wait until they were officially together, but he just looks so perfect right now.

the moment is rudely interrupted by the door banging open with a furious bakugou on the other side.

“DEKU!”

midoriya doesn’t have a particularly hard time avoiding his punches and restraining him. he’s gotten much better at hand to hand combat, and kacchan isn’t dumb enough to use his quirk in a hospital.

or, at least he thought that. bakugou’s got the beginnings of an explosion right next to izuku’s head when kirishima screams.

that gets both of their attention. he’s whimpering slightly and trying to scramble out of the bed with a terrified look on his face. did he find out what izuku did?

no, that scared expression isn’t pointed at him.

“Eijirou? What’s going on?”

“S-Stay away from me!”

kacchan looks more hurt than izuku’s seen him in a long time. god, this is going even better than expected.

“Ei, it’s just me.”

“I know it’s you! You’re the one who- I trusted you!”

“Eijirou, I don’t fucking know what you’re talking about!”

“You’re the one who raped me!”

bakugou recoils like he’s been hit. midoriya’s never seen or heard him be so weak, it’s amazing.

“What? Why would you say that?”

“The baby, Bakugou! He looks just like you! He /smells/ just like you!”

izuku cheers internally. he hadn’t even thought about the scent aspect, of course the baby’s going to smell like his father.

“That’s impossible, Ei. I would never- I didn’t-“

“Leave me alone! Y-You raped me and then I let you claim-, I never thought you’d do that to me, Katsuki! Why?!”

kacchan looks mortified. he’s probably trying to wrack his brain for any way this could have happened.

he seems to come up with an answer when he turns on midoriya with pure hatred in his eyes.

“You fucking did this.”

izuku doesn’t like letting himself get hit, but if he’s going to make kacchan the bad guy..

“Stop! He didn’t do anything! I figured it out on my own.”

“Eijirou.”

midoriya watches bakugou reach for kirishima only to have him aggressively pull away. he looks so hurt. perfect.

but that hurt quickly turns to determination and he jabs izuku in the chest while he seethes.

“I don’t know how you did it, but I’m gonna fucking prove it was you, you piece of shit.”

he gives ei one last sad look before he storms out of the room. prove it? he’d like to see him try.

izuku turns to the sobbing redhead and schools his smug expression into one of concern.

“Kirishima! I’m so sorry, I don’t know how he got in here.”

it feels so nice to have eijirou lean into his touch like this. he knew he’d look for comfort in an alpha when his is.. unavailable.

“I just don’t understand! If he wanted to have sex, I would’ve said- I /did/ say yes!”

midoriya grips him tighter.

“What?”

“A-After I got pregnant, we- so many times!”

izuku is fuming. how could he be so stupid? he thought eijirou would be too traumatized to let anyone fuck him, but he underestimated whatever he had with kacchan.

“I’m so sorry Kirishima, I promise I’ll keep him away from you.”

“But-“

“Shh, it’s alright.”

—
he ultimately “gets a hold” of kirishima’s parents, but he quickly regrets it when he’s no longer the person eijirou’s going to for comfort. not to mention the baby..

he thought once kirishima found out about “what happened”, he would hate the child! or at least resent it, but it somehow had the opposite effect.

he won’t let it out of his sight. the only time izuku’s seen him smile in days is when he’s looking at the little brat. it might have something to do with the baby’s scent being so close to his “estranged” mate’s.

or maybe he just /loves/ the stupid thing. it’s served it’s purpose, but izuku hasn’t had a single chance to get rid of it.

it’s always either with eijirou or his mothers, the only time he was left alone with it was once when kirishima went to the bathroom, and if it were to suffocate then it’d be too suspicious.

he’s not going to let his whole plan be derailed by a fucking infant /kacchan/ fathered.

—
kirishima shocks everyone by bringing the baby back to the dorms. apparently his moms will take care of it when he’s in class, but it’s still surprising he’s okay with caring for it alone.

but izuku can use this. yeah, the baby likes him well enough, and there’s no doubt eijirou will need help. especially since he refuses to change dorm rooms.

but he /still/ hasn’t gotten a chance to get rid of the little obstacle. it’s like the stupid thing makes a single noise and eijirou is immediately there.

he’s rubbing kirishima’s back on his bed after the baby’s fallen asleep and eijirou’s eyes are drooping.

“I don’t understand how you can stay so close to Kacchan after what he did to you. Aren’t you scared?”

“It’s not about that.. he’s my mate... gotta stay nearby....”

that’s it! how could he have forgotten that? of course eijirou would want to stay close to his mate, it’s basic biology! the solution was right under izukus nose all along.

“You know, the best way to break that bond, is to mate with someone else.”

eijirou’s wide awake now.

“Are you joking? I don’t want to mate with anyone else.”

“Not even me?”

he doesn’t like the frightened look on kirishima’s face when he crawls over him. izuku isn’t the same scrawny kid he was when he started UA, so it makes sense eijirou’s concerned with the alpha looming over him.

“Izuku? What are you doing, dude?”

he’s starting to push himself away, but a large hand pulling both of his wrists over his head stops him.

“Don’t you trust me, Eijirou?”

“Dude, get off, this isn’t funny.”

he looks like he’s trying to keep from looking scared, but the way he whimpers when izuku tears his shirt gives him away.

“Don’t worry, Eijirou. I’ll make you feel good, and you won’t be stuck to Kacchan anymore.”

“Don’t!”

sweatpants are surprisingly easy to rip off. so are boxers.

“I’m helping you, you won’t be trapped with him.”

he smiles at the pretty redhead beneath him and watches his eyes lose focus as he starts to overwhelm him with his scent.

kirishima is /strong/, but even he can’t fight the way an alpha’s scent effects him when he’s unprepared.

izuku had to use blockers that night in the alley, but this is different. this time, he’s doing all of it for eijirou.

he leans down and kisses his slack mouth as he pulls down his own pants. even eijirou’s whines are enticing as he lines himself up and pushes in.

fuck, he feels even more amazing than last time. sure, he’s crying a little and he’s not really wet, but that’ll change soon. izuku starts a slow pace and kisses down to the healed scar on eijirou’s scent gland. he can’t wait to ruin it.

the only thing making this any less than perfect, is that bratty child starting to cry.

••

katsuki is laying in his bed, trying to ignore every single instinct he has.

that’s /his/ fucking baby screaming it’s lungs out, every second he isn’t comforting it makes him feel more and more like a shitty alpha and a horrible mate.

but he knows eijirou doesn’t want him there, not right now. but he’s so fucking close to proving it was deku, and once he does that, he can have his family back.

but why the fuck isn’t eijirou comforting the baby? it’s been minutes, usually he’s there within one.

and katsuki knows the baby hasn’t even been picked up, his crib is against the wall he shares with eijirou.

fuck, he really shouldn’t, but if his son doesn’t stop wailing soon, he’s going over there.

—
fucking hell, it’s barely been another minute and the kid’s practically choking on screams. he /knows/ eijirou is an amazing parent. something’s wrong.

“Eijirou! What’s going on? You in there?”

maybe it’s an invasion of privacy, but he’s definitely got his ear to the door.

there’s whispering and he can tell now that the baby isn’t the only one crying. there’s no way a locked door is keeping him out.

he doesn’t give any warning before the handle’s blown off and the door swings open. he nearly gags when he’s hit in the face by the densest scent he’s ever smelled.

his eyes take a full few seconds to focus and he’s faced with the worst scene he could’ve imagined.

fucking deku is thrusting into his crying mate with a hand over his mouth and kirishima’s arms held over his head. the fucker doesn’t even seem to have noticed bakugou, or maybe just doesn’t care.

eijirou looks at the doorway with wet, pleading eyes and cries out as much as he can with his mouth covered when a particularly hard thrust slams into him.

katsuki sees red.

he can barely make deku move an inch by hitting him like this, but he can’t fucking set off a big explosion with eijirou unhardened right under the piece of shit.

deku doesn’t even falter until katsuki burns most of the skin off his lower back. what the fuck is wrong with him? bakugou knew he was the one who hurt kirishima before, but raping him like this with a fucking baby in the room?

his baby, katsuki’s baby, screaming while his parent is being assaulted. bakugou hopes that the increase eijirou’s thrashing is because he’s getting to deku enough that his ridiculous scent output is weakening.

he doesn’t know when his mate managed to pull his hand free and claw dekus away from his mouth, but he knows exactly when eijirou screams “Knot!”. he yanks dekus head back by that disgusting green hair and detonates on the side of his face.

he hears eijirou choke on air when he shoves the distracted midoriya hard enough for the green fuck to end up on the floor.

a fraction of a second later, deku is lunging for the crib.

katsuki doesn’t know what he’s doing until eijirou is screaming and his own hands are covered in red.

“Katsuki stop!”

he feels the sting in his busted knuckles and he pulls back to see deku on the floor with blood staining his face and crotch.

he growls like a fucking animal and midoriya chuckles before leaving the room.

“You’re too late, Kacchan.”

what the fuck does that mean? eijirou sobs loudly and katsuki jerks his head to see him holding a hand against his neck with blood seeping out between his fingers.

he wants to kill deku, genuinely kill him, but katsuki’s mate and child need him right now. and yes, eijirou is still his fucking mate.