This is just a post so the Idea I had for an MHA story where an adult Pro Hero Izuku ends up back in his past when he started at UA and does not know what to do other than what he does best, save as many people as he can, smiling while doing it.

Until this point, today had been a good day for Izuku Midoriya. it was another day living his dream of becoming a hero! His time at UA, training to become the next number 1 hero like his idol, All Might, had been great! He actually made friends with some of his classmates, and Kacchan's bullying had diminished. It was still there, like when they had their first hero class. But this... this wasn't supposed to happen. Villans had infiltrated the USJ, where they were supposed to practice rescue training. One of the main villains had scattered his classmates around the USJ and he ended up with Tsuyu Asui and Minoru Mineta in the flood zone, surrounded by villains. At least they managed to escape. But that leads to where Izuku found himself now, watching in slow motion and frozen in place, as the main villain was about to kill Tsuyu right in front of him.

When Shigaraki was nothing more than a hair's length away from Tsuyu's face, an enormous boom echoed throughout the whole of the USJ as a green blur broke through the roof, landed in the center, and continued moving at insane speeds right towards where Shigaraki was about to touch Tsuyu face. The blur passed by, and Shigaraki's hand hit nothing but air.

It happened in an instant. One moment Izuku was frozen by the edge of the flood zone, and now he was standing at the entrance with the rest of his classmates, who didn't get scattered as he did.

"Looks like I made it in time, I'm glad I did." A deep, unknown voice said. Turning to where the voice was, Izuku was met with what could only be described as a heavily modified version of his own hero outfit. The figure who was wearing the outfit was tall, had a lean build that was packed with enough muscles to not hinder any form of mobility. His entire build could be described as a broad-shouldered swimmer's build. His face was covered by a cowl with his iconic bunny ears and a metal mouth guard.

"Sadly, I can't stay still for any longer. More people need saving. The teachers will be here any second and protect you guys tho." The unknown hero, for he must be a hero, said. His glowing green eyes and tone making everyone who could see and hear them feel safe.

With a crackle of green lightning, the mysterious hero vanished from sight again.

"Does anyone know who that was?" someone asked. Izuku wasn't sure who.

"No," Izuku answered. "But whoever it was is here to help."

All of his classmates were surprised at Izuku's tone and felt the same safety spread through them as when the mysterious hero had assured them of their safety just seconds before.

"I didn't know you had such a broken mobility character unlocked Eraserhead," Shigaraki said, his tone drippy with venom and anger at being denied his kill.

"Guess instead of getting to All Might through his students, I will get to him through his co-worker," a downright evil glint entered Shigaraki's as he made his way towards the downed pro-hero.

Shigaraki never got the chance to do anything, for when he was about to put his hand on Aizawa, the same green blur that took his students away came back, accompanied by another boom and a giant cloud of dust that obscured everyone's vision.

"Huh, I guess the shock absorption was stronger than I remember, or I just didn't hit it hard enough."

The voice was unfamiliar, and one Aizawa didn't know, but even his own cynical thoughts felt strangely reassured.

"You came at me with a punch so strong it kicked up the ground...? You would at the very least break a lot of my bones if that hit me! Oh, the hypocrisy of you heroes! Using violence to get your way-"

"Oh, be quiet, you overgrown man child. I knew your pet would come to save you," the new arrival said, his tone annoyed. "And it means I need to beat it before I can get to you. So just sit tight while I deal with your pet." With his piece said, another punch was thrown, but this time at the hulking monstrosity that held Aizawa down. It disappeared alongside the unknown hero and Aizawa himself, who showed up among his students at the entrance.

Izuku "Deku" Midoriya was not having an enjoyable week. A week ago, while he was out on his daily patrol, he was hit by an unknown quirk while trying to de-escalate a situation with a quick gone out of control and found himself sent into the past.

Dodging another wild punch thrown by the Nomu, he was currently fighting he threw his own counter punch, overwhelming the shock absorption and throwing the Nomu into the air. Throwing out blackwhip and ensnaring the Nomu, Deku pulled himself towards it punching it repeatedly, turning the Nomu into a Yo-Yo punching bag. Deku thought back to the week he had spent in the past and couldn't help but chuckle in his own head at the fact he turned vigilante again because of his need to save people. At least, this time it wasn't because of a misguided thought that he could do everything himself.

Throwing the Nomu back down towards the ground, and embedding it in the concrete floor, Deku landed next to it in a crouch. Throughout his fight with this Nomu, he had thrown it around the USJ so he could rescue the rest of his then classmates.

Pulling down his face guard, Deku smiled at Shigaraki and Kurogiri. The same smile he uses to keep civilians calm during rescue situations.
"The Nomu isn't getting up. I overloaded its shock absorption, and its healing has been overwhelmed. Please give up and turn yourself in and end this peacefully"

The anger burning hot through Shigaraki boiled over. "YOU CHEATER, YOU MUST HAVE CHEATED! THAT NOMU WAS SUPPOSED TO KILL ALL MIGHT! HOW CAN SOME NOBODY EVEN PUT UP A FIGHT AGA-"

Shigaraki was cut off again as the doors to the USJ burst open, and All Might appeared with the rest of the teachers of UA. A frown plastered on his face instead of his usual smile.

"Have no fear, students! Why? Because we are here!" All Might yelled out, his voice heard through the whole of the USJ.

"Oh great, at least now I have the chance to actually Kill you All-" Instead of finishing his sentence Shigaraki yelled out in pain as his hand burst open with blood as it was shot by Snipe who kept firing his gun down at Shigaraki, who got hit in the leg before Kurogiri came to his rescue, teleporting them both away.

Lifting his hands in surrender, Deku stood still to not provoke any of his old teachers to attack him. All Might appear in front of him, the same frown still in place. Keeping his own smile in place, Deku goes to explain.

"I'm only here to help, All Might. I have actually been wanting to talk to you and Nezu. It's really important."

His frown deepening, All Might asks, "And what would you need to talk to me and Nezu about?"

A frown also appearing on Deku's face "Can you get Cementoss to get give us some privacy? It is a sensitive topic."

Not knowing why, maybe it was the serious tone or the fact this unknown vigilante had helped defend his students but All Might deciding to trust him, mentioning for Cementoss to put up a wall around him and the vigilante.

Now that they were alone, a smile returned to Deku's face as he reached up for his cowl, taking it off, chuckling at the shocked expression on All Might's face when he saw his own.

"My name Izuku Midoriya, Pro-Hero name Deku, and I'm from the future."

Sorry about the notification about an update. I just found out I uploaded the wrong version of the chapter. It was supposed to end right there. Now it should make more sense at the start of the next chapter :P