[I haven't seen season 6, so I made up something-]

You have several traumas that happened throughout your life. Your dream is to be a hero, and you managed to achieve it, but your childhood friend Katsūki Bakugō always said that you would be one of the worst. So you started to freak out and decided to be against heroes.

It was raining, the street was empty because there was a villain in the area, so the heroes (1-A) had more freedom to fight. They were all in front of you, far away, Todoroki had created an ice barrier behind them, so you had no way out. Everyone was looking closely at you, seeing what your next attack would be.

Kirishima: "Dude, we're sorry! Come back to UA, please man!" He spoke, shaking a little

Bakugo: "Let me sort it out, this nerd thinks he's in charge." He says snapping his fingers and smiling defiantly