Izuku was incredibly nervous.

He had momentarily forgotten about everything when he was having fun with Katsuki in the shower but, after what had happened in the changing room, it was sure the whole class now knew he was an omega. If they hadn't seen it with their own eyes, then they had at least smelt the huge amount of arousing pheromones he had released when he had been in heat. Figuring he was an omega in this case wasn't hard.

Moreover, Izuku was going to have to face Sero and it was stressing him out like nothing else. He had no idea how he should act nor what he should say to the dark haired alpha. It was scaring him and unnerving him.

"Midoriya!" His name was called as soon as he entered the lounge. He had hoped not a lot of people would be here since it was a Saturday morning but of course everyone had chosen to stay in the dorms this weekend. All eyes turned to him and his heart instantly began to race inside his chest.

"Hey, you okay? You really worried us!" Kaminari was the first to talk. He already knew Izuku's secret so his presence slightly reassured the tiny omega. But then other people started to speak and Izuku's whole body stiffened.

"Why didn't you tell me you were an omega!?" Ochako asked. She had been one of the most shocked person by the revelation and she felt hurt her friend had never confided to her. Izuku's heart ached at the sound of the pain inside her voice but the omega didn't even have time to reply that someone else already talked.

"Hiding his second gender was reckless, it put people and yourself in danger!" Iida lectured and Izuku lowered his emerald eyes in shame, culpability setting inside him. It was true. Hiding the fact he was an omega was dangerous not only for him but also for the people around him.

"Shut up, four eyes." Katsuki growled as he protectively stood by Izuku's side. He wasn't going to let people talk shit when they didn't even know anything about Izuku's situation.

"Yeah, leave him alone, man. He has his reasons to hide the fact he is an omega." Kirishima took Izuku's defence as well. He didn't understand how someone who wasn't even an omega could accuse Izuku of hiding his second gender. They weren't the one who would have to face the discriminations omegas had to, so they didn't have the right to say anything about the matter.

"You knew about this?" Jirou pointedly asked Kirishima.

"What? How comes he told you and not me!" Ochako took offence. She was so much more trust-worthy than Kirishima, after all.

"Well, something kind of happened so he had to tell me..." Kirishima tried to explain but everyone was starting to talk at the same time, questions and accusations coming from everywhere.

"What happened!?"

"Why would someone hide something as important as this!"

"Who else knows, too!?"

Izuku was getting overwhelmed. He knew people would have questions but this was too much. His private life and second gender didn't concern anyone but him. All the attention he was currently getting was stressing him out and scaring him.

"Midoriya." Sero unexpectedly approached him and his whole body instantly tensed up in response.

"Stay the fuck away from him, you rapist!" Katsuki immediately protected his omega. He couldn't believe Sero would even try to speak to Izuku after what had happened. It looked like a bloody nose and a black eye wasn't enough for making him understand he had to stay the furthest away from the tiny omega.

"What? I'm not a rapist!" Sero angrily replied. "He was the one begging me to help him!" He exclaimed as he pointed toward Izuku's direction.

"He was in heat!" Katsuki saw red. There was no way Sero was going to blame everything on Izuku and then get away with it. "He didn't fucking know what he was doing! He doesn't even remember what happened!"

"Well, I couldn't know that!" Sero claimed. Being accused of rape was serious and the dark haired alpha refused to accept it. "He kept moaning and calling me alpha, what did you want me to do?!"

"Because he didn't tell you anything just before going into heat, maybe? Didn't he ask you to get the fuck away from him?!" Katsuki furiously shouted. He knew there was absolutely no way Izuku hadn't said anything just before losing consciousness.

"He did..." Sero reluctantly admitted. He remembered Izuku telling him to go find Katsuki before going into heat. "But I couldn't leave him alone when he was in pain!" He retorted. He hadn't known at first what was happening and had been too worried about Izuku's state to just leave him all alone in the changing rooms.

"And then he just smelt so good, looked so sexy... I couldn't possibly resist tasting him."

Katsuki instantly lost all control at Sero's words. "You bastard! You're so fucking dead!" He roughly grabbed Sero's collar and violently punched him on the face, a fight erupting between the two alphas.

"Bakugou! Sero!" The rest of the class immediately panicked at the sight. "Stop!" They tried to separate them but Katsuki was going feral, the intense hatred he felt toward Sero completely taking over his rationality. "I'll kill you!" Utter wrath was blinding him as he kept hitting Sero, the sound of painful screams and bones cracking not even satisfying him.

"Kacchan!" Izuku called out but Katsuki was too far gone to even hear it. The only thing in his mind right now was the unbearable urge to kill Sero and the intense need to make him regret ever laying his eyes on his omega. Nothing else mattered more at this instant, not even Izuku calling his name and begging him to stop.

"Katsuki!" But Izuku suddenly shouted and Katsuki abruptly froze at the sound of his real name escaping the omega's lips.

"What?" He roughly let go of Sero to face Izuku. "What did you just fucking call me?" He breathlessly asked as utter shock overtook him. Izuku had never called him Katsuki even once during all the years they've been together. As far as he could remember, the omega had always called him Kacchan.

"Calm down, Kacchan. I don't want you to fight." Izuku spoke in a soft and calming voice. He began to release soothing pheromones as he slowly approached Katsuki, his scent turning incredibly sweet and relaxing. It was the first time the majority of his classmates ever smelt the omega's pheromones and so they watched with fascination how easily Izuku managed to completely calm Katsuki down, the power he had on his alpha just amazing.

"Sero." Izuku's voice unexpectedly turned harsher as he looked at Sero.

"When you'll be a hero, do you intend to rape any omega that goes into heat next to you with the excuse they smelt too good?" He asked and everyone suddenly became silent, the impact of his words taking them aback.

It was true. Several omegas accidentally went into heat every day in public. You couldn't be a hero if you weren't able to help them and instead ended up assaulting them. "You need to work on controlling your instincts better." Izuku stated. It was one of the most important thing to master in order to become a hero.

Sero looked down in shame at Izuku's words. He realised how correct the omega was and felt culpability slowly set inside him. He shouldn't have done what he had. He should have tried to fight his instincts harder and go find help.

"I'm not mad at you because I'm also at fault, I shouldn't have hidden my second gender." Izuku continued to talk in a calm but firm manner. "But it can't happen again, especially with someone other than me." By choosing to study in a school full of alphas, Izuku had accepted the risks his decision came with. Other omegas didn't.

"I'm sorry. I really am..." Sero whispered in a quiet voice filled with guilt. Hurting Izuku in any way had been the last thing he had wanted to do, but he had done it and now he couldn't possibly apologise enough to the omega.

"It's fine. There's nothing we can do about it anymore." Izuku sighed. He knew Sero hadn't lost control on purpose. "But don't ever touch me again. Only Kacchan is allowed to." He firmly declared.

His words once again surprised everyone. They all knew Izuku and Katsuki were incredibly close, you had to be blind to not notice it, but nobody had expected such an intimate confession to come from Izuku. Not even Katsuki.

"You guys are finally official?" Kaminari asked with a grin. He couldn't even remember the number of times someone had asked them if they were together only to be answered no. Izuku finally admitting they were in a relationship was unbelievable.

"Yes. He's my alpha..." Izuku timidly confessed. He was tired of hiding things. Revealing he was an omega had lifted a weight from his shoulders and now he was going to make sure everyone knew Katsuki was his. It was time people knew they were both off-limits.

"Guess it means we can't flirt with you anymore, huh?" Kirishima joked and Katsuki grunted in response. Alphas were finally going to stop hitting on Izuku. It was a good thing because Katsuki really didn't think he was going to be able to resist beating the shit out of anyone going too close of his omega any longer.

"Oh, you can." But Izuku unexpectedly answered and Katsuki immediately let out a low growl at the words. "The hell?" He snarled, anger quickly swelling inside him, when Izuku spoke out again. "But I won't flirt back."

"You better." Katsuki rolled his eyes as Izuku giggled next to him, the sound of the omega's laughs so adorable he didn't even have it in him to be irritated.

"Now, I apologise for having lied to all of you..." Izuku eventually faced his classmates, his emerald eyes casted down as he spoke. He looked nervous and anxious; his hands were timidly fidgeting with the hem of his shirt. "I'm an omega and I can't control when I go into heat. I'll probably be expelled if the school learn about this..." He explained in a quiet voice.

The whole class maybe now knew about his second gender, but the teachers still didn't. If they had known, they would have already called him to the principal's office. It meant Izuku was safe as long as everybody kept his secret...

Izuku looked right into everyone's eyes as he pronounced his next words. "Don't think only because I'm an omega it means that I'm weak. I won't let anyone stop me from becoming a hero." He declared with unwavering determination.

He'd let nothing stand between him and his dream.