Katsuki was livid.

He wanted to scream his guts out. He wanted to let out his utter wrath in a turmoil of destruction and violence. He wanted to explode and to tear the whole fucking world down, until nothing was fucking left of it.

Someone other than him had touched Izuku.

Someone other than him had dared put their fucking hands on his omega and nothing could possibly infuriate him more!

Katsuki saw red. He snapped, murderous instincts suddenly taking over him. He grabbed Sero by his collar and threw another explosive punch at the fucker's face, an absolutely blood-curling growl escaping his lips as he burned with rage. "You goddam bastard! I'm gonna fucking kill you!!" He yelled and followed punch after punch as he completely exploded.

"Ugh.!" Sero could do nothing but to take the hits and to grunt in pain at the strength of them. He was already half passed out from Katsuki's first attack and could only spat blood as Katsuki beat him to a pulp, no chance of escape nor mercy in sight.

"Bakugou! Stop!" Other students who had followed Katsuki to see if Izuku was okay started to pour into the changing room. They were met with utter chaos, their eyes landing on Katsuki in a complete feral state beating the shit out of Sero while Izuku whimpered in pain on the floor. The omega had curled up on his side, an overwhelming amount of arousing pheromones surrounding him.

Kirishima and Iida had been in Katsuki's team during the combat stimulation. They hadn't understood what was happening when Katsuki had unexpectedly sniffled the air before suddenly running toward the changing rooms but, with the sight they had before their eyes, they could only guess what was going on.

"Stop, Bakugou!" They immediately reacted and hurried to separate Katsuki from a bleeding Sero. Kaminari and Tsuyu who had also came to see how Izuku was doing rushed into action as well. "Hold him down! He's going to kill him!" One of them screamed meanwhile Ochaco was in shock at the scene, her eyes wide as she understood all the pheromones she could smell where coming from no-one but Izuku.

"Fuck the hell off! Gotta murder this fucking rapist!" Katsuki kept shouting while vehemently struggling to shove off the people that were trying to stop him. He used his explosions and didn't care if he hurt anyone, his utter anger completely blinding him. He couldn't be defeated as incredibly powerful threatening pheromones oozed out of him, rendering any weakest person near him completely useless.

"Call the teachers!" Iida told Ochaco in panic. They were no match against a dominant alpha on rampage. Katsuki was going to kill them all with Sero if things kept going like this.

Katsuki heard him and suddenly snapped his head in his direction, his crimson eyes blood-shot as he let a deep growl that made the entire changing room shake. "Don't you fucking dare call anyone!" He commanded in a voice that imposed utter submission. Katsuki still had some clarity even in the feral state he was in. Teachers seeing Izuku in heat was the last thing he wanted.

"Midoriya's an omega..." Ochaco murmured in disbelief as her eyes still hadn't left Izuku's trembling body.

"Fuck!" Katsuki cursed aloud. He realised too many people were here and that Izuku's secret wasn't one anymore. More importantly, the omega still was in heat and whimpering in pain on the floor as unbearable warmth literally burned him from the deepest of his core.

Katsuki's protective instincts were getting overwhelmed. He didn't know what he should do between finishing to kill Sero off, exploding everyone who had seen Izuku in heat or actually taking care of his omega that was in pain.

"Get the fuck out, all of you!" He finally growled out, the urge to go to Izuku too strong to resist. He violently shoved a barely conscious Sero away from him and watched as Kaminari and Tsuyu hurriedly went to the dark haired alpha's side.

"I swear to god I'll fucking kill anyone who goes near me or MY omega!!" Katsuki threatened in a loud blood-curling snarl and people could only tremble under the alpha's dominance, their only alternative being to obey with the amount of threatening pheromones Katsuki was letting out in the air.

Katsuki let out another loud curse as he finally went to Izuku's side. He wasn't managing to calm down at all and felt anger swell inside him again at the sight of Izuku's hero costume half-opened. He remembered how Sero had just been about to penetrate Izuku when he had arrived and couldn't believe how someone other than him would have taken his omega's virginity away if he had been only two seconds late.

"A-alpha..." Izuku whimpered when he felt two strong arms lift him up from the floor. The tiny omega was currently in so much pain he could only tremble and whine as his entire body ached with unbearable need.

Katsuki roughly shoved Izuku on top of his shoulder before starting to walk toward the showers of the changing room. "You just had to go into heat when you were alone with him, huh?!" He irritably scoffed, a permanent scowl on his face.

Katsuki was angry.

Actually, angry was an understatement. There was no word that could possibly describe the amount of rage he was currently in.

He was angry at Sero. So angry he wanted to kill him and rip each of his limbs off his body one by one. The bastard had almost raped Izuku. Actually, Katsuki hadn't seen what had happened before he had arrived but the chances Sero had penetrated Izuku in any other way were high, and any kind of penetration that wasn't consented was rape.

Katsuki growled at the thought of any part of Sero's body in contact with Izuku. It was driving him crazy and filling him up with impossible wrath.

"You fucking reek of him." He snarled as he shoved Izuku under the showers and suddenly turned on the water without any warning.

The water came out freezing cold and startled Izuku. "Ah! Alpha, too cold!" The tiny omega whimpered, a pained yelp leaving his pink lips when Katsuki roughly grabbed him by his green hair and forced him to stay under the showers.

"Shut up." Katsuki growled.

He was also angry at Izuku. He knew he shouldn't; after all, the omega had no control over his unstable heats, but Katsuki couldn't help it. Seeing Izuku moaning and begging underneath another alpha than him had hurt him so much. He had felt betrayed and cheated on. His heart had completely shattered at the sight of it.

"Gotta erase his fucking scent on you." Katsuki seethed as he got under the showers as well, not caring about the fact he was still completely dressed. He grabbed some soap that was here on purpose and proceeded to scrub every inch of Izuku's skin, his movements harsh and hard. He couldn't stand the smell of another alpha on his omega. It was making him sick and driving his instincts insane.

"No, alpha..!" Izuku writhed and squirmed under Katsuki's touches. The water had now turned hot and the burning heat that was filling his entire body felt even worst. The pain the omega was in was horrible, as if his whole being was on fire. He really needed to come but Katsuki wasn't letting him have any kind of release.

"Hurts!" He whimpered as tears began to swell inside his emerald eyes. He couldn't take the constant pain he was feeling anymore, it just was too much. "Hurts a lot, alpha!" He loudly cried out in desperation and Katsuki finally reacted.

"Fuck." The alpha cursed before sitting against the wall and forcibly placing Izuku across his laps, the omega laying with his ass in the air right on top of Katsuki's thighs.

"Ngh!" Izuku loudly moaned when Katsuki suddenly entered two fingers inside him. He didn't even have time to adjust to the sudden intrusion that Katsuki already started to finger-fuck him, lewd mewls leaving his pink lips each time the digits perfectly hit his prostate. "Alpha!" He whimpered in overwhelming pleasure.

Katsuki wasn't being gentle like he usually was. His fingering was rough and rapid, straight to the point. His objective wasn't to pleasure Izuku but merely to get the omega off. He was too angry right now to care about being cautious and gentle. He was so mad about the situation; so mad at Sero; so mad at Izuku...

Above all, he was so mad at himself.

If only he had been the one to accompany Izuku, none of this would have happened. If only he had been more cautious, Sero would have never touched Izuku. It was all his fucking fault because he had known the risks but hadn't done anything about it.

"Fucking hell!" He growled as he thrusted his fingers faster inside Izuku, roughly pounding the omega's prostate over and over again. "Ahh! Nghw!" Izuku kept moaning louder in response, his entire body quivering on Katsuki's lap while tears rolled down his cheeks. His dick was rubbing against Katsuki's thighs and his pleasure-button was being abused non-stop. The stimulation was too much and too overwhelming.

"Ngwhh!!" He suddenly came with a loud cry, his whole being shaking at the strength of his orgasm while his insides clenched and twitched around Katsuki's fingers. But Katsuki kept finger-fucking Izuku through his orgasm, pushing the omega to his limits and making him cry in oversensitivity.

When Katsuki finally pulled his fingers out of Izuku, the tiny omega was passed out. However, his heat had faded away and his pheromones were slowly disappearing from the air.

"Fuck..." Katsuki cursed under his breath. This situation was a whole fucking mess.

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