Previously on One A Left, the reunion between Eri and Mineta was cut short by two high-end Nomus. During the fight, Eri created a portal back in time, however, only Mineta was able to get to the portal because of Eri's sacrifice. Now, after crash landing in the USJ during the USJ incident, our main character performs a show of pure power by turning the Nomu the villains brought to kill All Might into a fine red paste.

Now enjoy the show

I own nothing

The villains stared at the newcomer in fear as the hulking individual's three right arms started multiplying until they formed a long railgun barrel made of limbs. The towering newcomer aimed the barrel at a random spot on the U.S.J's dome ceiling before the figure spoke. "AP Railgun," They spoke, their gruff voice slicing through the tension like a knife.

Suddenly, a powerful explosion fired from the railgun made of arms, creating a deafening rumble as the sound of concrete crumbling followed suit. The figure then aimed the railgun barrel at Shigiraki as five more barrels made of arms sprouted, three on the left, two on the right. All six aimed at Shigiraki, but not firing as if the barrels were only a threat.

"I'm giving you a chance to leave, or we will find out what AP Railgun does to someone who doesn't have a defensive quirk." The figure spoke, their voice cutting through the silence like a sickle through a field. Kurogiri then almost immediately used his quirk to get him and Shigiraki to safety. The other villains immediately surrendered, knowing that they couldn't risk taking on the overwhelmingly powerful being.

The figure's arms retracted back into the six as they turned around and made their way to where Class 1-A stood, the other heroes in a combat stance, their fearful gazes tracking the figure. The figure stopped, before they removed their helmet, revealing a gruff, unkempt face with large round eyes, pupils of purple glancing at the quaking group, a large scar running down his face diagonally crossing his lips, and the far most identifying trait were the basketball sized purple balls the man had in place of his head of hair, now cascading down his back as a ponytail made of continuously smaller hairballs. The shortest student's eyes widened in recognition.

"Is that...ME?", the younger Mineta asked, his expression turning into awe. At the uttering of that question, the groups eyes all widened in shock as they a ll recognized the individual as Minoru Mineta, although much much taller and mature variant of their short and perverted classmate.

Before long, the villains were captured, but the class still had a very confusing individual to take care of.

"How do I explain this?" the older Mineta asked, his gruff baritone somewhat startling the confused group before him.

"The only answer to this is that you're from an alternate timeline!" Izuku Midoriya shouted, grabbing the attention of the class and bringing a knowing smile, although a small one, to the older Mineta's face.

"I forgot how much new quirks excited teen you, Midoriya." the older Mineta said to himself, clearly talking to Izuku Midoriya's vestige. Mineta then went with the young class back to U.A, with hopes that Nezu would be able to use his intellect to confirm the supposed time traveler's story.After some time, Aizawa takes Future Mineta to the school's chimera principal, who sat in his chair, too big for the small white furred mammal. After giving the rodent his full story, Mineta sat, hunched over slightly due to him hitting his head on the ceiling earlier.

"Hmmmm...I can only see that you are telling the truth. You being from the future is the only explanation for this." Nezu explained, rubbing his chin with a paw.

"However, I do wonder how we get you back to your timeline," Nezu inquired, looking at the towering figure.

"In the future, All For One is alive. In about December, he and the Paranormal Liberation Front, which hasn't been created yet, attack all of Japan, collecting quirks. He does die, but he takes 90% of the able-bodied heroes, and all of the Nomus become wild animals and kill anything that breathes." Future Mineta explained, his gruff yet stoic voice completely hiding his worry.

"My my...that his quite the apocalyptic future Mineta. I believe our best course of action is to make you our hero course's Damage Control teacher." Nezu suggested, his beady eyes scanning the hulking man."I agree. It would be both an excellent way to keep him here and a very important part of heroing." All Might said, his presence already known as he was present during the entire meeting.

Time flew by as the first day back from the USJ arrived, and class 1-A was excitedly waiting to meet a new teacher who'll also teach a hero related subject. Moments later, and a familiar towering figure walked in, his hero costume a perfectly blended amalgamation of all of Class 1-A's hero costumes.

"Green Class. My name is Udagichi Yukaigu, and I will be your Damage Control Teacher!" The man's gruff voice causing 1-A's eyes to widen in shock.

"Let's get straight to work. Get your hero costumes on and meet me in Training Grounds Gamma for your first lesson. Oh! I almost forgot. My hero name is Revenant, The Remnants Hero." The towering teacher ordered Class 1-A.After some time, all of Class 1-A were waiting in the middle of Training Grounds Gamma for further instructions from Revenant.

"Okay, class, your first lesson in damage control is how different quirks can affect the structural integrity of buildings you fight villains in." Revenant spoke, his words snapping members of 1-A out of their train of thoughts."To do that, we're going to just start by doing some basic open-ended questions. " Revenant spoke, his voice calm yet curious.