Disclaimer: I don't own My Hero Academia

Izuku woke up early that morning.

He quickly got dressed into his "villain" outfit which consisted of a black hoodie vest, black pants, black metal arm and shin guards and a black metallic mask that covered his entire head.

He also wore combat boots and a belt with various tools such as a taser, a grappling hook and several small projectile blades.

The outfit he had mostly forged himself except for the helmet (provided by Kurogiri).

He had a feeling he would one day be out fighting with the League, but he wanted to make sure his identity wouldn't be compromised. Still, he was ready to face Katsuki.

At the bar

Izuku met up with Tomura and Kurogiri where he also met their large entourage. Izuku was not sure what to think of the group. He had not seen them in action yet, but at the same time, they just looked like regular thugs.

What caught his attention was the bird-like creature who looked as tall and muscular as All Might.

'This must be the guy,' he realized.

Izuku didn't have much time to think however as Kurogiri's quirk completely absorbed him and everyone around him.

Unforeseen Simulation Joint

They arrived at an area that had various buildings with different natural disasters going on for each one.

The group of villains looked up to see the students and teachers at the entrance, who had also noticed them. Strangely enough, All Might was not present. Izuku didn't care though, that wasn't why he was here. He scanned across the student's faces until he came across a familiar one.

Wearing gauntlets and an outfit that matched his personality was Bakugo giving his usual glare. The moment he saw him Izuku felt a sudden flood of anger. He wanted to fight him, he wanted to hurt him, however, to do that he would need to get him alone first.

"Kurogiri could you warp me and 'you know who' to an area where we won't be disturbed?" he asked politely.

"Of course. I'll also send the students to other zones where they won't be able to interfere," he replied.

"Here comes Eraserhead," Tomura butted in.

The pro hero launched himself at the group and started fighting off the thugs like they were nothing. Meanwhile, the students and 13 were running toward the exit.

"Kurogiri," Tomura started.

"I understand," he replied. "While I'm at it I'll send you Deku to a place for your battle. Expect that boy to be there within a few minutes." Izuku nodded.

Kurogiri's power took hold again and Izuku was in a ruined city area. It was desolate and he was on flat ground.

"Perfect," he whispered.

Here he could fight Katsuki without interference.

After waiting for two minutes Kurogiri's mist appeared again bringing an angry Katsuki with it. At first, Bakugo did not take notice of Izuku, he just swore about Kurogiri.

"That fucking bastard! Those fucking villains! I'll fucking kill them!" he shouted.

'Swearing and death threats,' Izuku thought. 'Nice to see that he hasn't changed a bit.'

Katsuki examined the area around him when he noticed Izuku.

"You one of them?" he asked in a murderous tone.

He didn't pay attention to his classmates, not that he needed to, they were all beneath him. Izuku answered by taking up a fighting stance.

Katsuki smiled sadistically and punched his right fist into his left hand while causing an explosion as a form of intimidation.

"This will be fun," he snarled.

Izuku felt slightly nervous about fighting Bakugo.

"Give him hell". Razor's words echoed in his mind, and he was calm again.

He glared at Bakugo.

'That's right I've trained for this,' he thought. 'I'm not the same weak individual that you used to beat to a pulp. I'm Deku, the villain that will defeat you.'

With that, he charged at Katsuki.

Seeing his enemy move Katsuki started to swing his right arm. However, Izuku was prepared for this and much faster too. As soon as Bakugo swung his arm Izuku grabbed it, turned, and flipped him onto his back.

"When you get someone on their back get on top of them and punch them as hard as you can and as many times as you can."

Izuku started doing just that. While doing so every memory of Katsuki bullying came back to him which made his punches more vicious.

'This is strangely satisfying,' he thought.

Knowing he would be knocked out soon Katsuki released an explosion to faze Izuku and then another one to get him off. Katsuki stood up.

His mouth was bleeding from the punches, this made him pissed as hell. He screamed out in anger and unleashed a flurry of explosions on his opponent.

Izuku flipped from place to place dodging them with relative ease.

"This is the guy I was scared of," he thought.

He couldn't believe how well he was holding his own against Katsuki. Months of training were paying off, meanwhile, it seemed that all Katsuki had to rely on was his quirk because he had no training whatsoever in hand-to-hand fighting.

'So much for having a powerful quirk,' Izuku thought.

Having no luck at long range combat, Katsuki swapped to close range by rushing towards his enemy and swinging his right again.

'Seriously does he think that will actually work this time,' Izuku thought.

However, he was wrong. Katsuki used his quirk to propel himself over Izuku.

"Got you now," he shouted while successfully hitting Izuku with a lot of explosions.

Izuku lay on the ground with his clothes slightly torn and a crack in his mask.

"How'd you like that?" Bakugo sneered.

He assumed he had won but he couldn't have been more wrong. A few seconds later Izuku stood up not showing any sign of feeling injured, greatly shocking Katsuki.

"No fucking way," he spluttered.

Katsuki's attacks may have been painful, but they did nothing to dissuade Izuku. He was used to this sort of pain, well actually he was used to much worse. Razor did not play around.

Katsuki moved to attack again but Izuku came in very quickly and kneed him in the stomach. Katsuki flinched with pain. Izuku didn't stop.

He grabbed Katsuki by the shoulder and started to repeatedly punch him in the stomach, which caused the latter to vomit a little.

Izuku then grabbed him by the shoulders and headbutted him so hard that part of his mask broke off showing his right eye. In the process, he had broken Katsuki's nose causing blood to flow from it. Izuku then let go of Katsuki, leaned back, and side kicked him up into the air.

Katsuki tried to retaliate but Izuku was quickly behind him and grabbed him by the collar. He then ran and threw Katsuki into one of the ruined buildings where he was sent crashing through the wall.

Seeing no movement, Izuku assumed he was unconscious.

'I did it Razor. I won,' he thought as he turned to leave.

Izuku was hit by another explosion on the back, though this time he managed to remain standing.

"Hey," came a hoarse voice. "This fight isn't over you bastard. So don't turn your fucking back on me."

Izuku turned to see Bakugo standing, blood running down from his forehead and one or two bruises on his arms. He looked rather pitiful, like the state he'd put Izuku in for years. Oddly enough, it made Izuku happy to see him this way.

'I should have expected him to not go down without a fight,' he thought.

Katsuki stared at his opponent's eye for a moment. There was something familiar about it.

'Don't think about it. Just finish him off,' he thought.

For the first time in his life, he was hurt all over. He was used to dishing out pain, not receiving it. The whole sensation was strange. Which was why he needed to finish it quickly.

He held up his arm and reached for his gauntlets trigger. They stored up his sweat, which was nitro-glycerine which allowed him to create explosions. With the amount stored up in them both, it would be like firing a rocket launcher.

Izuku didn't know why but something told him to get as far away from Katsuki as possible. If he was reaching for his gauntlets, then they clearly weren't just for show.

He started running and as he did Katsuki shouted "DIE!"

From the gauntlets came a massive torrent of flames that moved very fast while consuming everything in its path.

Izuku instantly pulled out his grappling hook and shot it towards the nearest building on his left. Unfortunately, the explosion was too fast for him. While he managed to avoid death, the bottom part of his legs had been burned.

Izuku examined the damage Katsuki had done, it was very wide scale.

'What the fuck is wrong with him? He could've killed me or one of his allies in that,' Izuku thought alarmed.

"Ha. How'd you like that?" Katsuki yelled under the delusion he had won.

"Ok I've had enough of this," he said to himself.

He walked toward Katsuki who could not believe his eyes.

"Why won't you just stay the fuck down!" he screamed as he prepared to attack him again with his other gauntlet.

Izuku was prepared this time though. He threw one of his blades at one of Katsuki's hands, causing him to howl in pain.

"When you're in pain put all your power into that point of pain and deliver the final blow".

Izuku ignored the pain in his legs and charged at Katsuki. His bully tried to defend himself with his quirk, but Izuku leapt up, spun and delivered a kick to Katsuki's face with full force. Katsuki fell back and his face landed hard onto the ground. This time he did not get up. Izuku checked his face, he was unconscious.

"I won," he declared before walking off.

"Kurogiri I'm finished over here," Izuku told him over the communicator in his mask.

"That's good to hear. I had a camera or two around your area, so your battle has been recorded for Razor to see," Kurogiri informed him. "All Might's here by the way, and the pros will be here soon also. I suggest you make your way back to us at the centre."

"I will," Izuku replied.

As he walked, he could really feel the pain in his legs. Katsuki did a better job than he thought.

"I'm almost there now," he said to himself as trudged along.

Suddenly he heard a scream. He turned to see a girl in pink being held to the ground by one of the thugs. She looked terrified.

"Now then," the thug declared. "Let's have some fun shall we."

Izuku had a very good idea of what he was about to do and headed towards them. He may have been a villain now, he may be a colder and serious person, he may be willing for heroes to die, but rape, that was a different story. Despite his time with the League Izuku still possessed a certain degree of morality.

The girl's terror increased when she saw another villain appear.

The thug turned to Izuku and said "What do you want? Can't you see I'm busy?"

Izuku, annoyed with his tone, tased him in the neck knocking him out cold. The girl was stunned at what just happened.

Noticing her expression Izuku said, "If you don't want that sort of thing to happen to you then I suggest you run. Find your friends and get to safety."

At first, she didn't move, she was still shocked. Izuku glared at her and yelled "Now!"

With that, she scrambled away while still looking at Izuku. He then turned and proceeded to where his allies were.

He arrived just in time to see All Might blast that bird-like creature out of the building. There were a bunch of unconscious thugs. Tomura was also there with Kurogiri looking very pissed off.

"Are you guys alright?" Izuku asked them.

"Nomu got beat," Tomura raged.

'So that's what that thing was,' Izuku realised.

He made his way to them. He also looked at All Might. It was strange, his childhood idol was now his enemy and a kill target for his new group.

All Might was staring at the new arrival.

'Great just what I need, and I've already gone past my limit,' he thought.

He inspected him further. There were burn marks over him and he was limping.

'He's injured,' he realised. 'Those marks, did Bakugo do that to him?'

He knew the boy well enough to know what kind of damage he could deal.

"I take it you finally defeated that explosion user," Kurogiri said.

'They are talking about Bakugo,' he thought.

"Yeah, I beat him," the new villain said with pride. "I beat him to a bloody pulp."

All Might tensed slightly in anger at this.

"You," he said in a furious tone.

The villain turned to look at him (he had a green eye from what he could see).

"Relax he isn't dead, just unconscious," the villain told him.

All Might was both relieved and surprised at this.

"What the hell Deku" Tomura yelled. "Why didn't you finish him off?"

"You know very well that I don't kill," he retorted. "That was one of the conditions I set when I joined this group remember."

Now All Might was definitely surprised. Deku wasn't a killer yet he joined this band of villains with some conditions. Just who was he?

Izuku noticed that All Might was steaming.

'He's reached his limit,' he realised.

Izuku remembered that from their last encounter All Might had told him that he can only use his power up to three hours a day, when he steamed, he reached his limit and reverted to his real form, something no one else knew about.

Izuku did not know why but something told him to keep his mouth shut at that moment. He was in possession of a very valuable piece of information. If he blurted this out now All Might would most definitely know who he was. Not only that but they were at a disadvantage with so few forces and the pros on their way.

"Tomura, Kurogiri, let us withdraw for now," he told them. "We're at a serious disadvantage with him here and the pros on their way. Also, our ace was just blasted out of here and our forces are down."

The two just stared at him.

"He's right Tomura. The situation isn't in our favour," Kurogiri stated.

Tomura scratched his neck in frustration.

"Fine," he relented.

He turned to face the Symbol of Peace.

"All Might beware because your days as the symbol of peace are numbered!" Tomura swore.

All Might grunted in response. "We'll see about that."

For some reason, though he was still staring at Deku.

'From the sound of his voice, he seems to be in his teens. Also, that eye, why does it seem familiar?' All Might pondered.

This boy probably wasn't that much older than his students. It made him sad to think that someone that young had become a villain.

Kurogiri's mist surrounded his allies, and they disappeared from the area. During the transport, however, Izuku lost consciousness.

At his apartment

Izuku woke up surprised to see that he was in his apartment. He moved his legs slightly, but he felt no pain in them. He inspected his body. There were no signs that he had ever been injured.

"It wasn't a dream if that's what you're thinking," came a voice he knew all too well.

Izuku looked to his right to see Sensei sitting at the table drinking what could've been tea or coffee.

"Hello Deku," he greeted the boy. "It's good to see that you're awake."

"Sensei you're here," Izuku replied stunned.

He had spoken with the man before but had never met him in person.

"Why are you here?" Izuku asked before he could stop himself.

Was he in trouble? Once again Sensei seemed to know what he was thinking.

"You're not in any trouble. I came today to sort out a few issues with the League and just thought I would check up on you. You came back with severe burns and have been out for nearly two days now," he explained. "We had to use your regeneration drug to get rid of all life-threatening injuries and scars. Otherwise, you might have died."

"Thank you," Izuku replied. "However, I'm guessing you didn't come to just check up on me."

He knew Sensei well enough to know that he wouldn't come here in person unless it was very important. Sensei grinned.

"Observant as ever I see," he said. "You're right I came here to discuss something with you. Something that happened during the assault on UA. And I'm not talking about your fight, that was impressive."

Izuku sat up straight and faced him.

"It's about your decision to retreat. There were cameras around the area, so I saw the entire ordeal. While your reasoning was logical, and the pros did show up shortly after you had left, there was something else that made me curious," he informed Izuku. "Why didn't you tell the others that All Might had reached his limit?"

Izuku was definitely surprised now.

'If he knows about that then he must have a history with All Might,' he realised.

He took a deep breath. He needed to be careful about his answer.

"It's because I knew it that I didn't tell them," Izuku explained.

"Oh," Sensei responded amused.

"Let me point out something. I told you about my first encounter with All Might. During that encounter I learned about his little weakness, however, I also learned something else. He told me that not a lot of people know about this. Therefore, since I am one of these people blurting it out would have led to my identity being exposed," he explained. "Besides, you clearly know about it too, yet you didn't tell the others so you're in the same boat. How did you know it? From what I have seen of you every time All Might has been mentioned you got angry, meaning you've some sort of history with him. So, tell me, am I wrong?"

There was silence.

'Maybe I went a little too far,' he thought nervously.

However, Sensei started laughing. Izuku was now confused.

"It appears I underestimated you Deku. You are correct with that assumption," he told the boy. "Your answer for not telling the others is also acceptable."

He wasn't joking either, if Deku had figured all that out from observing then he was a lot smarter than he originally thought.

"My past with All Might, well to explain I would have to tell you about my origins, something which I have no intention of doing," Sensei told Izuku. "However, if you know about his weakness, then I can tell you about his quirk."

Izuku shifted slightly in response. No one knew the exact details of All Might's quirk, people just assumed it was strength enhancement.

"All Might's quirk is known as One for All, one passed on for generations."

Hi there. Well, what did you all think of that? This was my first time writing a fight scene and I hope I did alright. When I imagined it, I thought it would be one where Izuku could kick Bakugo's ass but still struggle against him, given that he's already more powerful than most pro heroes. Anyway, please review. The next chapter will feature the aftermath of the battle for UA.