Sitting in his room throwing a ball up and down while laying back on his bed, Tagami Hayato thought about all he'd been through since he reincarnated and all that he'd found out about the world he was in.

He'd been reincarnated into the My Hero Academia world, he didn't think so at first and thought that it was just a regular fantasy world or superpower world but then he saw him. He saw All Might on tv, massive smile and everything. He was born to a young couple of Hero's, Hayato nearly shit himself when he saw his dad though, his dad was the spitting image of Muscular from the show. Well, he was whom Hayato thought he was, it turns out Muscular is a Hero in this version of the world.

When he realized this, Hayato knew that this world was different in some ways compared to the original one shown in the anime or manga. In this world, his father was called Tagami Kazuta. His mother was a woman whom he hadn't seen in the anime but she was a mutant. She had 2 Oni horns on her head, they seemed to give her an incredibly strong body.

She explained it to Hayato once and basically the horns spread a certain hormone to the rest of the body that promotes muscle and bone growth and strengthens them both, this all depends on how much the person trains. She had red hair and eyes. She also had an emitter quirk called "Strong Shoulders". Those two powers mixed together even gave his poor dad a run for his money. Her name was Tagami Aya.

Thinking about it, Hayato guessed that his mom was the one who put his dad on a different path. Even though he was still an incredibly hot-blooded man, he wasn't a murdering psychopath but more of a battle maniac.

'Well, thanks mom~'

Hayato stood up after catching the ball in his hand. If one were to look at the ball they'd see it was purely made out of metal and had small writing on it that said "150kg". Looking at the 'ball' that he didn't really need any more, he decided to throw it out his window.

'Won't be my problem after that.'

That was Hayato's line of thought anyway. Hayato used his Quirk seeing as he wanted the ball to be far away from him so people can't accuse him of throwing a 150kg 'ball' out of a window at the risk of injuring someone.

Hayato got into a baseball pitching stance and threw the 'ball' as hard as he could out of his open window.

*WOOSH!*

Turbulent wind rushed around his room blowing some homework he hadn't done around his room, while also taking a few books with it. Hayato ignored the wind with a deadpan expression as he heard his Mom walking up the stairs in a hurry.

'Shit, I forgot she was in. She definitely knows what I did...What am I gonna do?!'

Hayato was, to be blunt, absolutely terrified of his mom, she was a demon when it came to disciplining him. The thought Hayato had earlier about his mom showing his dad a better path made more sense the more he thought about it.

*Knock Knock*

"Hayato, I just heard you throw something. Was it another weighted 'ball'?" Even though she spoke in a calm voice, Hayato could hear the anger boiling just below the service.

"No-nothing like that happened. I just used too much power when I was practicing a punch, Mom." Even though he tried his best, Hayato's voice still trembled a little bit.

His mother seemed to think this was a possible thing and decided to give him the benefit of the doubt and she soon walked off.

Hayato let out a breath of relief as he felt like he'd dodged a bullet. He looked towards a mirror in his room.

What he saw was a much taller than average youth at about 6"4 with black hair, with some strands being dark red, and red eyes. He also inherited his mother's horns and had two Oni horns on his forehead but his were black while hers were red.

His height didn't make him look lanky or anything as he had the muscle to fill out the entire frame, both his height and muscle mass gave him quite an imposing physique.

Regarding quirks, he gained two. An upgraded version of his Mom's quirk, [Strong Shoulders], called [Strong Body]. Along with the hormone that the Horns released into his body, he had an immensely high physical strength, speed, and durability, even without his quirk factor being active. He also got a slightly upgraded version of his dad's quirk [Muscle Augmentation].

His father's quirk adds on muscle fiber outside of his body but Hayato could keep most of his muscle mass inside his body when he augments it. Well, apart from a thin but firm layer of dark red muscle fiber that appears on his skin when he really amps up his quirk. So instead of being like his dad when he activated his quirk; A hulking mass of muscle, Hayato was much leaner and athletic looking.

Hayato was 15 and he was about to enter U.A. High School, the main reason was--

"Young Tagami, quickly come out and train, before your mom sees us and stops you again!" Hayato heard a hushed and quiet whisper but despite the speaker's attempts to be quiet he still spoke louder than some people.

Hayato looked over at his window and saw an absolutely massive guy with blonde hair and blue eyes hanging off my window frame--It was All Might or Toshinori Yagi to those who were his close friends.

"All Might, be careful I'm falling off!" Hayato heard a nervous voice that spoke in a quiet mumble. It was Midoriya Izuku, a timid green haired green eyed boy who didn't have a quirk. And also someone who happened to be one of Hayato's childhood friends.

"Move out of the way then, All Might." As Hayato grumbled this, All Might moved and Hayato jumped out of the window and onto the street below. He didn't even bend his knees as he landed, unknowingly showing off his physical prowess.

All Might landed next to him and Izuku got off his back and walked next to Hayato as well. They were off to train at the junkyard, well, Izuku was, Hayato just went there to encourage him and to sometimes spar with All Might.

Hayato didn't know if he inherited some kind of Battle Mania off of his parents but either way, he found out that he loved to fight hence why he always tried to spar with All Might to improve on his fighting skills.

This all started when one-day Izuku and Hayato were walking back from school and they saw Katsuki Bakugo trying to fight a villain. Knowing what Izuku was about to go and do, Hayato couldn't let him do it on his own, so he went and helped. All the events that happened in the show at that time, happened. Well, with a few added punches from Hayato but it didn't change anything, All Might still started training Izuku.

I just turned up one day, saying that I followed Izuku and All Might just let me stay.

Right now, Izuku was currently pulling a block of metal with a rope. Even though Hayato could do it easily, like he was pulling a dog leash that was attached to a twig, he couldn't help but have a whole bunch of admiration for Izuku for the amount of determination he had.

"Man, he's tenacious. Guess it's one of his many good points." Hayato spoke this with a quiet whisper as he looked at Izuku. Even though it was a whisper, All Might still heard it.

"He is, but then again, so are you, Young Tagami." All Might spoke in his usual boisterous voice as he looked at Hayato.

"Yeah, but only because I know if I let up for even a minute, Izuku will overtake me without me knowing," Hayato spoke in a serious voice but what he said shocked All Might.

"W-what do you mean, Young Tagami?" The usually straight-forward All Might let a tremble enter his voice as he guessed that Hayato knew what he had planned.

"Don't worry, All Might, I only overheard you two speaking about it. I think you made an amazing choice." Spoke Hayato in a bright but deep voice.

Hearing what he said, All Might visibly relaxed. He nodded his head as if he was pleased with Hayato's answer.

After this short conversation, he and All Might had a small spar. The result was quite obvious; All Might wiped the floor with Hayato. But with misfortune comes fortune. Hayato's horns release more and more of that specific hormone the more he fights and the intensity of the fight makes them produce more if it's particularly rigorous. So fighting All Might who could easily push Hayato to his limits was Hayato's best way of getting stronger.

Before Hayato knew it the day of training was over and All Might had passed on his power [One for All] to Izuku before the entrance exam tomorrow. On the way back, Izuku said something pretty out of the blue to Hayato once All Might had left.

"I still think you should've inherited the quirk Hacchan. You're way stronger than me and you can handle the strength of the quirk..." Izuku spoke in his usual timid voice but this time it had a melancholic tone, which was different than usual because he usually spoke in a determined voice lately.

Shaking his head, Hayato answered him "Don't be stupid, Izuku. You're obviously the better choice because it's not about who's the most powerful, it's about who will be the best hero. And with how much you love heroes, you'll definitely become a brilliant hero. So cheer up, dude!"

Izuku cheered up after his childhood friend spoke some sense into him.

Both of them were unaware that All Might was on the rooftop above them listening to their conversation. Hearing what Hayato said, All Might looked incredibly proud as he spoke "Young Tagami, throughout these 10 months I haven't just been training Young Midoriya, I saw your potential, your insatiable need to become a hero. You'll probably outshine me sooner rather than later. You and Midoriya will bring forth something magnificent."

What All Might said about Hayato was true, he didn't remember most things about his previous life so in this life he treated his family as his very own and this world as his very own too. So he had an incredibly strong longing to become a strong hero. And All Might saw this and that's why he helped him.

Hayato walked Izuku home and ran back to his house while using his quirk to strengthen his legs so he could run at blistering speeds. He soon arrived home and jumped into his room via his window and after going downstairs and getting something to eat (About 4 plates of food) he went to his room and went to sleep, excited for the entrance exam tomorrow.