You were in love with Shoto Todoruki, but when you saw that he was with someone else, you were jealous. One day, out of jealousy, you threw his girlfriend from behind the school screen, and when you tried to collect her body, you didn't succeed and Shoto found out. He can and will hate you

He pins you to the wall and grabs your throat

"Awadi, why did you do such a thing? What did he do to you? Now I hate you so much that I want to make you beg."