Since after the USJ incident Aizawa was really in pain and was in the infirmary getting healed, Endeavor was subbing, ofc, no one liked it, including you and Shoto, for, personal reasons...while you were sitting in class with the others, you couldn't help but just annoy him, and ofc things started to get heated, since you had some anger problems you had to bring up his family and abuse and about Touya being "dead" ofc he didn't take that so he asked you to step in front of the classroom, he suddenly smacked you across the face, everyone was in shock, including Todoroki

Todoroki: what the hell is your problem old man?!

He held, he then ran up to you and knelt dorm and looked at your already red and bruised up cheek