Fist of the Emerald Heart Part 1: His Youth Start

Izuku Midoriya: The Start of His Roundabout Part 3

"An imposter? Yeah that's got to be it, that's the only explanation."

"Ummm young Midoriya?"

"And maybe he used a quirk that can switch with other people, so he switched the real All Might to some unknown place with no possible way of escape. No, that's not it, he's All Might, he can escape through anything."

If there was one thing that impressed Toshinori Yagi today, it was how the young teen before him could mumble that quickly with multiple ways of how All Might could have been 'defeated' by the 'imposter'.

'Sent to another dimension by a dimensional portal quirk where all quirk users are women? Well, I don't know about that, but he's imaginative, I'll give him that….wonder what I'd look like as a woman?'

He decided to end this mumble spree before it really got wild.

"Calm down Midoriya, I'm really All Might."

He saw him spring his head up quick, with his green eyes narrowing at him.

"Oh yeah, then prove it. Which state of the United States did All Might go to to study before he came back to Japan and made his debut here?"

What the? "I went to California."

"Which high school?"

"Motley Rose High. Go White Snakes!"

"Which hero college?"

"Sunset Eagles."

"After he graduated and made his debut there, how long did he stay in the country before coming back?"

"Three years. The first year I did hero work in Central, and the last two I went around the east-coast states like Rhode Island and New York."

 "Before he named his agency, Might Tower, in Tokyo he had several names before he settled on that one and in order they were Mighty Lookout, The Fortress of Might and All Might Sanctuary. Is that correct?"

That got him confused. "What? No, they're not in order and you're missing two. The correct order is Justice Mountain, All Might Sanctuary, The Fortress of Might, Mighty Lookout and um..." He looked down embarrassingly, his cheeks turning bright red. "All Might's Smashing Tower."

Izuku's eyes widened. "You really ARE All Might! Only a few on the internet know about the last one before Might Tower became the official."

Toshinori shook his head and waved his hands rapidly. "I only said that as a joke. I didn't know it was going to be on the internet. Do you know how many people called me from the tower wanting to find out how good I 'smash'? Too many. Most of them were women and some were men, surprisingly. The PR team went through a lot of forum websites and others just to get rid of it before it eventually settled down."

The boy's face then turned to worry and confusion. "All Might... what caused you to look like this?"

Toshinori let out a worn out sigh and sat down on the rooftop's floor. "Well... it all happened five years ago, when I fought against an enemy of mine that had to be put down. I won, but at a cost." 

He lifted the left side of his shirt, revealing a horrifying wound on the left side of his abdomen. Toshinori saw the young man's face turn a little green while trying not to throw up. 

"My respiratory system is destroyed almost completely and my stomach is now gone entirely. I had multiple surgeries on me to save my life, but now I can only do three hours of hero work before I change back to this true form of mine, which you see before you."

"Was it…," spoke Izuku, managing to keep the bile down. "Was it Toxic Chainsaw that did that to you?"

"Heh, that guy wishes he could do this amount of damage to me," Toshinori shook his head. "No, the one I fought with was much worse. I even requested to never make him or our fight go public.