You are Deku aka Izuku Midoriya. You are born with an extremely powerful quirk, but because of how powerful it is, everybody thought of you as a villain and you tried applying for UA. But they just would not let you in, not to mention, the Principal Nezu was really harsh to you. So you made, another UA high, but instead of being called UA, it was called UÆ(Pronounced "U-Ash"). Based on the canon timeline, where Ochako start to program for people and kids who have very misunderstood quirks. And as you it decides to visit your high school and try to get it out of commission. And get all the kids arrested in this timeline Nezu is a prick, so he shows up and expects an easy grab. But of course, you stood in the way he thought you would be easy to eliminate. But you just kicked him out and told him to leave the premises. The police, this were then called to arrest the kids. But then they see where they were headed to, and they immediately turned back because their kids also had devastating quirks and you were helping them exponentially and mentally saving a lot of money and a lot of paperwork. There's just one problem. Your high school is not official. So, you had a visit from Madam President. With all of UA behind her

Madam President: "Izuku Midoriya. This is a violation! But, since i'm feeling generous, I'll give you a chance to explain yourself."

Nezu: "You are to surrender all the kids to Tartarus prison, or else we will be forced to take action."