Slightly NSFW chapter

Bakugou still hadn't been able to speak to Kirishima. The omega pretended he didn't exist, didn't look at him and didn't acknowledge him. And the Bakusquad (for all he cared they could be called the Kirisquad by now, it made more sense) huddled around Eijirou, preventing any type of interaction between the two.

The worst thing was Kaminari was an arsehole about it. It's like he enjoyed seeing Katsuki struggle to receive the attention he was desperate for.

He just wanted to talk to Kirishima, to explain the truth to him, and then, if the omega decided he didn't want him, he'd let him go.

Would he, though? Bakugou wasn't sure. They were a fated pair, he was sure, he couldn't just let Eijirou go forever, since there was no other omega out there for him, and the alpha was sure he needed the redhead.

Something strange happened, though.

In the middle of one of Aizawa's classes, a stench like no other hit Bakugou and forced a low growl out of him. It was instinctive, he hadn't meant to lash out like that, but something in the primal part of his brain was alerting him that he had to act like that, protect what was rightfully his.

He snapped his head and found the reason for his problems. Midoriya was doubled over, a hand on his desk, his other arm wrapped around his middle.

The little shit was in heat.

And it was pushing the alpha to mate with him.

Bakugou gripped his own desk with both his hands, firmly, to make sure he wouldn't try to obey his primal instincts and jump the omega that smelt so… so fucking bad.

He was confused. Weren't omegas supposed to smell heavenly? This stench was making him nauseous, but it was still trying to invite him in. Explosions started to come out of his hands as he forced his body to stay in control.

'Deku isn't the one that I want', he tried to reason with himself while he maintained his gaze on his desk, which was slowly blackening due to the heat emanating from his palms.

Uraraka shot up from her seat and made Midoriya levitate, excusing them both from the classroom. Aizama sighed and told them to open the windows, they needed to ventilate the room and calm down.

Once the tension was reduced he continued with the lecture, but Bakugou could sense he had his eyes on him more than was necessary.

When the teacher finally dismissed his class, his scarf shot out and grabbed Katsuki's wrist.

"Not you. We need to talk."

"If it's about the desk just call my old hag and make her cough up the money." The blond retorted, trying to fight against his restraint.

"It's not that, Bakugou." Aizawa sighed, rubbing his eyes tiredly. Once all the students had left he let the young alpha go. "I saw the way you reacted with Midoriya. You're paired, right?"

The teen didn't want to admit it.

"Sort of." He huffed, looking away.

"I know he's paired, Bakugou. Don't be so difficult. So you're his alpha? Any idea why he's entering a heat now?"

"No! I never touched him! I'm not his alpha. It was in his own best interest! I bit him out of fucking pity or whatever. But that's it."

Aizawa was silent, scrutinizing him.

"I see." Was all he said. When Katsuki raised his gaze and decided they were done with the conversation he prepared to exit the class.

"Just…" the teacher began, and he looked like he'd rather be fighting against villains than saying what he was about to tell him. "Make sure he gets the shot if you decide to… take the plunge."

Small explosions erupted from the younger alpha's hands. Like he didn't know how the shots worked and when omegas needed to take them. He felt more enraged about the fact that his teacher actually believed he'd have sex with that disgusting little shit.

Bakugou left before he could lash out at Aizawa.

But there was something troubling him. After all those years in which he'd felt nothing, why now? Why had Deku gone into heat?

He had to go talk to him.

He obviously couldn't now or he would most certainly fuck him into the mattress and he would rather die than shove his dick up that omega's arse.

So he went over to talk to Uraraka, the second best thing.

"Round face, what the fuck?" Was his way of greeting her when he found her sitting next to Iida at the canteen. She was a beta and he was an alpha too.

"Okay, what are you talking about?" She rolled her eyes at him.

"Why did fucking Deku go into heat?"

She averted his eyes. She knew.

"Tell me."

"He's been having trouble with his medicine." She ended up saying, watching him warily.

"Again?" Bakugou frowned. Something was not right.

"You need to speak to him." She offered, and the look she gave him almost made him feel bad.

"We know what you did to him." Iida spoke, waving his arms slightly less firmly than normal. "And Midoriya-kun is extremely grateful to you, but there seems to be something wrong with him right now and maybe you can help."

"I'm not having sex with him. Never. I already told him so." Katsuki snarled.

"Maybe it's the only way." Uraraka whispered, and she looked like she was in pain.

"He can go fucking die for all I care. I'm not going to mate with him."

"You did this to him!" The beta girl frowned, angry. She curled her hands into fists. "Don't just back out now because you think it's not your problem."

"It's not my problem. I didn't fucking do anything. He can't take his sodding medicine? Well, he should deal with that."

"But it's affecting you too, Bakugou-kun." Iida noted, ever the smart one. "Don't you want it to get better for you too?"

"I'll find a fucking way that doesn't involve my dick getting dirty." Katsuki snarled, flicking them off as he walked away.

He'd have to talk to Deku, like it or not.

And with Midoriya going into heat, it was even less likely that Kirishima would want to talk to him. He'd seen it with his own eyes, and what had happened. His fears had been confirmed. They were mated.

Because, of course, since Izuku and Bakugou were pared, no other alpha had reacted to him being in heat. And the blond had accidentally let slip his own pheromones, ones that meant 'don't get fucking close to him'. He'd been prepared to fight any alpha that got close to the omega and he'd been ready to sink his dick into the boy's awaiting hole.

And Aizawa had noticed and had had them open the windows.

So of course Kirishima had noticed. The whole fucking class had fucking noticed. Everyone fucking knew.

Which meant the Bakusquad knew.

Which also meant there was no way they were ever going to let him talk to Eijirou.

And, for the second time in his life, Bakugou regretted ever having bitten the little snot.

Bakugou didn't know what to do. When he spent time cooped up in his room he felt pent up and restless, but he couldn't do anything else.

Talking to Kirishima was out of the question now. He hadn't dared approach him with all the shit that had happened, but he wanted to, so badly.

He wanted to tell him how Deku's scent smelt like shit to him, and that couldn't possibly be normal.

He wanted to hold Eijirou. His omega. He wanted the redhead to feel warm and cosy in his hands, to cuddle against him, to feel safe and serene in the arms of his alpha. He also wanted to bury himself to the hilt inside that tight arse.

But interrupting Midoriya's heat was the last thing he could do, no matter how badly he wanted this inferno to end.

He didn't want to go back to class, where everyone knew, everyone judged.

On the other hand, if he didn't go to class, he'd just be confirming their theories, and Kirishima would most definitely think he was mating the other omega.

So Bakugou forced himself to go to class and pretend they weren't whispering about him.

His desk had been replaced, and at least that was a relief. He didn't want to have to look down to see physical evidence of what the omega had done to him.

Or what he'd done to the omega.

He wasn't quite sure at this point of who was to blame and who'd fucked over who the most.

Kirishima was not only not talking to him but was now wearing a red collar around his neck, and wearing it with pride at that.

Katsuki was tempted to burn his desk down again. Because he knew what it meant that the omega had done what he'd done. He wanted to scream in frustration, grasp the redhead and kiss him full on the lips and tell him he was wrong and they were meant to be.

But Raccoon Eyes was on full alpha around him. Completely possessive and aggressive, but only towards Bakugou. The idea that maybe they'd paired crossed Katsuki's head, but when he caught a whiff of Eijirou's smell he couldn't detect anything abnormal about it, so he was most probably still unmated.

Plain Face and fucking Pikachu were also surrounding the omega like vultures, keeping an eye out for any possible enemy.

So, it was confirmed. They knew. And they would not let the blond alpha touch their precious omega.

Bakugou snarled in anger and let the days pass.

The first day Midoriya was back in class, Bakugou was nearly jumping up and down in excitement. He stopped himself, of course, because wanting to be happy to see the shitty omega was the last thing on his list, but he did feel relieved.

"We need to talk." He muttered to him as he brushed past him at practice. Deku looked at him and their eyes met. The green locks bobbed up and down as the boy nodded, understanding.

They were at Izuku's room, which, come to think of it, was a bad idea. It still smelt like the omega's previous heat and it was making Bakugou uncomfortable, but the blond bit his tongue. He'd been firm about not letting the other into his room. If Kirishima ever decided to go back he didn't want it smelling like Midoriya.

"You're going to have to explain a few things." Katsuki said, folding his arms over his chest, watching the other from as far as he possibly could be without leaving the dorm room.

"I tried having sex with someone else." Deku spoke, far too confident than was normal in him, like he'd been practising what to say the whole week he'd been cooped up in his bed.

Bakugou frowned. He was the last person on Earth that would want to know the details behind the omega's sex life but right now it seemed vital.

"That's it?" was his way of demanding more information and the other sighed, tilting his head back.

"Turns out I can't have sex if it isn't with you, Kacchan." Midoriya smiled weakly, but the both knew there was pain behind his stance.

"But that doesn't explain why you went into heat."

"Yeah… it kinda does… But okay. I tried having sex, it didn't go very well, like you would imagine, and since then… my body's been rejecting the medicine."

"So it's like you haven't been taking the suppressants at all…" Katsuki nodded, pensive. "And that's why your heat came."

"Yeah."

The stood there, watching each other in silence.

"What… what do we do now?" Deku whispered, looking away, embarrassed.

"You stink." Bakugou frowned, watching as the omega in front of him curled around his body.

"I… I took a shower after practice… I'm-I'm sorry."

"Not like that. Your heat. It smells fucking horrible. Like rotten flesh."

Their eyes locked again and the alpha could feel the worry in the other. He knew what the omega was thinking, even if he wasn't voicing his concerns.

'Am I officially not good for anyone anymore?' he was asking himself, and hell if Bakugou knew the answer to that. Not that he would tell him if he did.

"Just… why the fuck did you try having sex with someone who wasn't me?" Bakugou snarled, the pressure in him almost making him snap.

Deku looked at him like he wanted to strangle him. Not that he'd try, ever, but it was still a weird expression for the boy to pull.

"So I never have sex? Is that what you're suggesting? It's one thing that you claimed me, Kacchan, but you can't just manage my sex life for me."

"Well, you knew what would fucking happen, you shit head. Don't come crying to me begging me to ail you when you did this to yourself."

That shut Midoriya up, but the omega still looked at him with defiance in his eyes.

"This is still our problem." He ended up saying, his green orbs locked onto red ones. "It affects you almost as much as it affects me."

He was right of course, but Bakugou wouldn't admit it. He bit his tongue but his gaze remained fixed on the freckled face.

"And how are we supposed to solve it?"

"Have sex with me." Deku stammered, his face flushing as he offered his body so willingly.

The alpha's red eyes narrowed, his lips curling into a snarl.

"You fucked around with someone else, don't bring me into this shitty mess!"

"You bit me out of pity, can't you fuck me out of pity, too?"

Pity. Regret. Interchangeable words in this case. Sure, it looked like pity from the outside, but Katsuki knew that he was being played. He was confident Deku knew the real reasons behind Bakugou's actions, he'd always known. The boy was useless any other way, but he could read him like an open book.

Alright.

Al-fucking-right.

Bakugou fisted his shirt uniform and ripped it off of his body, not caring about tearing it. Not caring about anything anymore.

He was beyond fucked anyway. Deku would emit this awful smell for the rest of his life that would make him go crazy with disgust and want and Kirishima already hated his guts and wouldn't let him even explain himself. Might as well try and enjoy the ride.

An angry hand gripped Midoriya's chin and his face was turned to look at the alpha, his red eyes menacing as he crushed their lips together.

The omega tasted bad.

Like whatever this other person had done to him had soiled him forever.

Why the fuck did this all feel so wrong?

His pants were off in a rush and he palmed his limp dick miserably while Deku wasted no time, ridding himself off his own clothing. He proceeded to finger himself, getting ready for the most awkward sexual encounter of their lifetimes.

Bakugou just couldn't get hard. No matter how much he pumped himself or thought about Kirishima. Occasionally his dick would jump or twitch in his hand when he came up with a particularly good image of the redheaded omega waiting for him to embrace him, wet and scrumptious, smelling like everything good and looking ready to be fucked.

But instead he was facing Deku, and they both looked like they'd rather be confronted by the sludge villain again.

Well, there was no turning back now.

"Kiss me or something you shit. I'm not getting hard."

And Midoriya leaned in and pulled them into a kiss that was like needles.

"I think I'm ready." Deku panted, removing his fingers from his hole, showing the gaping entrance to Bakugou, as if that would make him feel anything.

They positioned themselves better on the bed, Midoriya splaying his legs apart, looking behind himself as Katsuki tried lifting his dick up and entering his hole.

The alpha couldn't bring himself to line his limp shaft to the omega's entrance. He just couldn't do it. He didn't know if it was the still disgusting scent from the heat, or the sight in front of him, or the need he had for Kirishima, but his stomach churned uncomfortable and he found himself running to the small bathroom in the dorm.

He had been right all along. If he tried to have sex with Deku he'd make himself sick.

"You-You okay there, Kacchan?" he heard Izuku's nervous tone from the other room.

"Does it sound like I'm okay!?" The blond gritted his teeth, heaving as another wave of nausea shook him.

"Aren't you supposed to be fucking alluring or something?" He said when he'd finished washing his mouth and face and he felt like he could stand again.

Deku was sitting on the bed, still naked, watching him. His small body looked so fragile, so weak, he was surprised he could endure all the injuries he caused himself.

"It's not like I want to have sex with you either." Midoriya muttered, turning away.

"Is this… maybe our bodies are repelling the match?" Bakugou asked, but it was more like he was talking to himself. Was that even possible?

Izuku shook his head.

"That's not what's happening to me." He spoke, slowly wrapping his arms around his legs. He rested his head against the wall and started crying, his shoulders shacking with each sob.

"I ain't fucking happy about this shit either, stop with the stupid, useless crying!" Bakugou snapped at him, looking around the room for his boxers and putting them on. He found his shirt had been ripped to pieces and he tossed it away, ashamed and bitter.

"You don't understand, Kacchan!" Deku whimpered, his hands raising to rub at his already sore eyes. "Just because you're an alpha you don't get it!"

But, for once, Midoriya wasn't giving Katsuki enough credit. Of course he understood, of course he knew the pain. Maybe because he felt he was in a similar position.

"You can pair with anyone else and I'm just left here, useless and lonely! No alpha can take me and the one that should, doesn't want to!"

Bakugou almost added insult to injury by explaining that he couldn't either, really, but instead watched as the green mess of hair bobbed downwards as the boy ducked his head.

"But what use is pairing with whoever when the one I want to pair with doesn't want to pair with me?" the alpha spoke to himself, and was relieved the omega was too into his own misery that he hadn't heard his words.

"I'm broken!" Deku whined, only semi trying to wipe away the fat tears that were rolling down his cheeks.

"You're not the only one. I'm broken too."

Midoriya turned to look at him, a mixture of disbelief and anger in his frown.

"How are you broken, exactly?"

"You smell horrible to me when we're paired, I think that can only mean that there's something wrong with me." Bakugou said, but it was only half true. Without having smelt his heat after biting him and before he tried to have sex with someone else, there was no real way of knowing if that was correct. Maybe he'd always smelt fucking awful, or maybe this other person had fucked it up for him, fucking Deku up more than they were prepared to assume.

Midoriya was silent next to him.

"You can always find another." He managed to stammer, averting his eyes.

"But I don't want anybody else." Katsuki said, mostly to himself. He was forgetting where he was, who he was talking to.

"You can't possibly mean me."

Bakugou slowly turned his head around to look at him. The other looked pathetic, sitting there, naked and full of tears and snot on the badly made bed that still smelt of his disgusting heat.

"Of course not." But he'd said too much, and if Deku was half as smart as the blond knew he was, he'd figure it out.

"Kirishima." Came the answer, and the alpha realised it was the only name on the planet he did not want this omega speaking, for some absurd reason. "I'm guessing he saw how you, and only you, reacted to my heat."

He was met with silence as Katsuki adjusted himself on the bed.

"Did he reject you?"

Bakugou was not going to answer that.

But apparently Midoriya knew the answer already.

"You could tell him the truth." He spoke those words as if the blond had a chance, as if Kirishima would be understanding and forgiving.

The alpha snorted. He was about to explain the situation a little bit better, but then he realised who he was talking to, and instead, he jumped off the bed and started collecting his discarded clothing from the floor.

"Fuck you." He offered as an answer before he made it out of the room to inhale non heat contaminated fresh air.