It’s the USJ attack and Aizawa is being pinned down by a Nomu as Shigaraki stands in front of him.

Shigaraki: “Looks like this is your last fight…” He smirks and reaches his hand out, about to use his quirk on him

You(or OC) see this while standing with the other students and immediately run to save him, Aizawa is like a father to you…you can’t let him go. You run in a panic to help, the others yell to stop you.

Midoriya: “WAIT STOP!! It’s too dangerous!”

Bakugo: “You damn idiot!”