Chainsaw Hero

Training

"Young men! I'm making a heroic entrance!" All-Might, in his fully muscled form, dashed to the playground and struck a pose in front of the two kids.

"What!? All-Might? You're here?" Izuku frantically said, flapping his hands around while Kacchan stood there in shock.

"All-Might, what the hell are you doing here?" Kacchan yelled, crossing his arms, and tried unsuccessfully to hide the excitement of seeing his hero in person.

"I. AM. HERE... to start a conversation!"

"Huh? Oh, I know! We need to thank you for saving us yesterday!" Izuku bowed forward with his arms at his side, though Kacchan didn't join him.

"Young men, you two have been through an experience that nobody should have to find themselves in. But... you showed me something that I haven't seen in a long time: the drive to save the other person without thinking. The complete selflessness to give yourself up to give the other person a chance, that is what I'm looking for in a successor!"

"A... successor?"

"Yes! See, I'm sure you know my time here is limited. But—" Suddenly, blood poured out of his mouth, splattering onto the ground as he disappeared in a puff of white steam.

And the reveal?

Was a frail, skinny man with a skeleton figure. A poor copy of the man from before with scraggly yellow hair framing his frowning face.

And Kacchan and Izuku both screamed.

"You're all shriveled up! Huh?! Were you... huh?! A fake? An imposter? So thin!" Izuku screamed, pointing at the man in front of him.

"... I am All-Might," he said, blood pouring out of his mouth with every word.

"No way!"

All-Might sighed. "You know how people hold in their gut at the pool? It's like that."

"No way...!"

"You've seen the real me, kids. But don't write about it on the internet, okay?"

"...No way."

All-Might slid down to the ground, lifting the hem of his white shirt to show a large wound that covered up more than half of his torso on his side. Both Izuku and Kacchan stiffened at the sight of the ghastly wound, stitches radiating around a red and purple bruise. The skin was rippled and textured as if it were mountain ranges that separated continents. "Five years ago... An enemy did this to me. My respiratory system was nearly destroyed and my stomach was removed. I've wasted away because of the after-effects of those surgeries. So, I can only do hero work for about three hours a day now."

"Five years ago? Was it your fight with Toxic Chainsaw?" Izuku questioned, flinching at the mention of yet another chainsaw quirk.

"That lowlife? He could never do this to me! But seriously kid, you've done your homework! Though, this fight was never made public. That is because I asked that it not be made public."

"But why are you here, All-Might?" Kacchan said.

"See, I've come to thank you two. Out of all the people at the scene, it was only a couple of teenagers, hurt and in danger, who acted! You two spurred me to action! Most of the top heroes show greatness, even as children. Many of them claim that... their bodies simply moved before they could think!" Izuku slowly folded in on himself, tears in his eyes as he stared at the ground in front of him. "That's what happened to you back there, yes?"

"Yes...!"

"Then, you too can become a hero." Upon hearing these simple words, Izuku collapsed onto the ground and sobbed, scraping his knees on the dirty ground as he gripped his forearms with all the strength he could muster. Kacchan slapped a hand over his mouth, tears welling up too but were refused permission to fall. But underneath his hand was a maniacal grin, one of the happiness at being validated and seen. "I believe you are worthy of inheriting my power."