You were in Endeavor's agency, fighting this vigilant, Mr. Smiley was his name, which is kinda weird.. But! Izuku got sent flying to the wall while trying to use his quirk on the guy, he was laughing now against said wall he got thrown into while holding his stomach.

Katsuki; "AGH! Damnit, the stupid nerd is down!"

The angry blonde yelled as Endeavor, him, Todoroki and me tried to fight the vigilant. That's when he ran off and you went to follow him.