Disclaimer: Naruto x My Hero Academia - I own neither
Story Start!

Toshinori Yagi couldn't help but smile to himself.

A tall man, at least 7 feet tall, with a extremely slightly muscular body, with his bones being mostly visible and his lankiness making him have the appearance of a skeleton with some muscle and skin. Long and wild blond hair, blue eyes surrounded by black instead of white, wearing far too baggy clothes such as a white shirt and green pants with a good belt.

"Yes, I can't believe I got the last copy that they had, American movies are just the best. I can't wait to get home and watch this." Toshinori spoke to himself under his breath, wife smile on his skeletal face as he thought of the hour and a half of fun he was going to have watching this movie. It was rare for Japan to have American movies on sale, since it wasn't their primary language, and listening to a movie while reading subtitles just wasn't fun, and hearing the movie get dubbed when words and mouth movements didn't watch wasn't great either.

At the ripe age of (secret) he just enjoyed watching movies more than nearly any other activity.

Realizing he was blocking the exit of the store, he quickly started to walk as a larger bear-like man (bear-like as in he had the literal appearance of a bear, fur and everything) huffed and walked passed him with a bag of groceries in his clawed hand. Toshinori waved awkwardly with a smile, not meaning to be a bother to the man.

Taking a step backwards-

"What the hell!?"

He bumped into a young man, and he quickly turned his head and saw that he had knocked a younger man onto the ground. The boy wore a black coat that was open in the front, showing a white button up shirt underneath, and black pants that were kept together by a tied up piece of robe. Also having spiky, wild, blond hair and bright blue eyes with similar peach skin as himself, Toshinori was a little surprised at the slight resemblence between them only for a moment. He saw that he was knocked an ice cream over and onto the boy's (maybe 13 or 14 years old, he wasn't that tall) coat.

"I'm sorry young man, I should have been watching where I was going." Toshinori apologized right away for his actions, and the boy looked up at him.

Three whisker marks on each cheek, odd, but not the oddest physical trait he had seen today alone. The bear-man being somebody who looked more odd for one, but none-the-less, he had knocked the boy's snack out of his hand and onto the ground.

"Damnit, and I just got this coat... whatever, now I've got to get another ice cream..." The boy stated as he dusted himself off without looking at Toshinori in the slightest, as if he hadn't been the one to do that. That, or because he apologized, the boy had decided to not get too angry at him for doing it.

He had to buy the kid a new ice cream at least, since it was his fault this had happened by back-stepping into him.

"Hey, since I caused this, I'll get you another. How about it young man?" Toshinori offered to the boy as he started to walk back to the store.

He glanced up at him with a raised eyebrow.

"I'm good, you apologized, that's enough for me. No use crying over spilled milk, anyway, that was the last of that flavor. Might as well not worry about it." The boy stated as he turned and started to walk down the sidewalk. Toshinori rubbed the back of his head shamefully, since he seemed to be unable to apologize for his actions. He looked down at the boy's hand when he saw some dots of red appearing on the sidewalk.

"You're bleed..." Toshinori started as he looked up at the boy's hand, only to see the scrap he got when he was knocked over, was quickly healing as the wound steamed closed. The boy's wound, in seconds, finished healing as he wiped his blood off onto his pants without turning around. "Ah... a Healing Quirk, you can heal." Toshinori mused to himself as he watched the boy for only a few more seconds.

Quirks.

Almost everyone in the world was born with a Quirk nowadays, a unique superpower that they could use. While most were inherited by the mother or the father, sometimes you would get a combination of their Quirks in the form of a new one. They could be classified under many different types, and it would seem the boy had something that gave him regeneration abilities. Only 20% of the world at this point had no Quirk, with the vast majority having them. With his whisker marked cheeks, he either had a Quirk, or he had inherited a mutation from one of his parents that was unrelated to a Quirk.

Speaking of Quirks, he could only use his Quirk for about 4 hours a day... of which he had already used up his time limit on his Quirk.

Thankfully, it seemed like a very peaceful day, so he shouldn't need to use his Quirk to do any Heroing today.

*BOOM*

Toshinori looked on as the middle of the street exploded, no warning, just a large explosion as one of the cars on the road exploded. Three people were launched out of the car, their bodies covered in cuts, but looking rather okay for being in an explosion. They had no burns on them, and the youngest person was on fire, but also seemingly okay. He noticed it was a child, about 3 years old. Okay, made sense now, the child had some kind of powerful flame Quirk and they manifested it in the car. The parents had flame Quirks, so they were okay with fires, but they had been cut up a little.

They wouldn't be okay if they got ran over by one of the cars coming for them though.

"Shiiiit." Toshinori cursed as he looked around, seeing no nearby heroes who were patrolling this area. He was the only hero in this immediate area, and by the time a hero arrived in a few minutes, those three would already be run over by a car.

He was forced to watch powerlessly as a car got closer and closer to them as they hit the ground, unable to react in time as they were run over.

At least, that is what should have happened with no heroes saving the day.

"Raaaaaaaah!" The same boy from earlier had seen what had happened, and he ran into the street, even closer to the seen of the explosion that he himself had been. He ran with all the speed his legs could carry him with, he started off by grabbing the dazed mother and throwing her onto the sidewalk. He followed up by kicking the child to the other side of the street, since the child was still on fire and he couldn't hold the child. His leg was set on fire though by that, and as the car got much, much closer, he grabbed the father by the collar of his suit and judo flipped him into the air.

All the people in the area either screamed or watched in horror as the boy sacrificed his own life to save the family, because they watched as the boy was slammed into by the car (a rather large white truck that looked familiar). He was sent flying across the street, where he numbly hit a glass window and was sent flying into a nearby store.

Cars came screeching to a halt, now having enough time to react to the crashes on the road.

"My baby!" The mother screamed as her husband hit the ground behind the truck, having been judo flipped over the top of the car as it went under him. She sort of ignored her husband in favor of running across the street to get to her crying and screaming child. Who was not only covered in bruises and cuts, but had been kicked across the street.

The father got back up, and ran towards his wife and child.

"Are you two okay!?" He ran with a limp, he had taken that fall very badly.

Toshinori was the first person out of those concerned for the teenage boy, who ran towards the broken glass window and saw the brutally injured boy laying on top of a destroyed shelf. He had shards of glass sticking out of his body, his arms and legs were bent in the wrong directions, his eyes were rolled up into his head, and he had a chunk of the wooden shelf lodged through his stomach.

Toshinori saluted the dead boy, tears in his eyes at the heroic act the boy did with no hesitation to sacrifice his own life for total strangers.

Truly, this boy was a true hero-

"OW... ow... ow... shit this hurts... fucking asshole... truck-kun, you don't get to isekai my ass today! I ain't no Subaru or Kazuma, and I sure as hell ain't no business man waiting to get turned into a Nazi Loli... FUCK!"

"What?"

"He's alive!?"

"Thank god..." Toshinori whispered as the shards of glass started to shoot out of the boy's body, his body parts snapping back into place with a sickening squelch. It was horrifying to watch as his body went from nearly dead and dying, to mostly fine as he screamed in anger at the top of his lungs. His blue eyes turned bright red, slit pupils, as his arms and legs were returned back to normal. The glass shards were all out of his body, and his neck snapped back into place as well, which had seemed broken. "Young man, are you okay, do you need any assistance!?" Toshinori rushed through the door of the store, not going through the broken window, as he rushed to the boy's side.

The boy was all healed, except for the fact that he was impaled through the stomach, but even that was healed as the wood chunk was pushed out of his body as he healed.

"Fuck... I'm fine... I hate this body..." The boy stood up and took off his coat, looking at all the holes in it as he was surrounded by adults who were worried for his safety. "Stupid body, moving on it's own to save people." The boy grumbled to himself as he started to wipe the blood off of his body.

Toshinori froze when he heard that.

"I'm sorry, but your body moved on it's own?" Toshinori questioned with a curious glance.

"Duh, whenever I see a person who needs help, my body just sort of moves. If I didn't have my Enraged Healer, I would have been killed by that... life couldn't have given me super strength... but nope, I just heal faster the more angry I get." The boy started to calm himself down, now that his Quirk was no longer truly needed.

"Boy, what's your name?!"

'His body... it moved on it's own... that is the same thing all the best heroes who go down in legend stated. He's got the same heart driving him as the best of the best...' Toshinori thought to himself with widened eyes, a grin growing on his face when he saw the boy grin a cocky grin.

"Uzumaki Naruto, and I won't stop until I'm the world's absolute best hero, a hero 1000 times better than any hero that came before me." Naruto introduced himself with a wide grin, before he put his hands into his pockets and started to go on his way. He didn't need to stay and get credit for this or anything, and technically, he didn't use his Quirk when he saved those people. His Quirk was always active, but it only worked when he was injured, so he couldn't even get in trouble for using his Quirk to save people.

He was just an upstanding citizen who was in the right place at the right time.

"A Hero's Heart, Passion, Drive... I've found him." Toshinori's eyes sparkled when he realized he had found the one.

This was the perfect candidate.

His successor.

Chapter End!
Please Leave Me Lots of Nice Long Reviews, But No Flames Please!

No, Naruto will not just be a replacement Deku, since unlike Deku, Naruto does have his own Quirk. Also, he has a different personality than Deku, so naturally the story will change.
Enraged Healer - The angrier Naruto gets, the faster he heals from damage, and the more damage he can heal from.

Note: This story uses the Naruto from Naruto Gakuen (Kishimoto's High School Naruto One-Shot)