Katsuki and Izuku were childhood friends until Katsuki found out that Izuku was quirkless. From then on, Katsuki would bully Izuku mercilessly. One day at their senior year in middle school, Izuku gives up on his dreams after hearing from his favorite hero, All Might, that a quirkless individual like him couldn't be a hero. He stood on top of the middle school building and jumped off; no one knows what happened to him or where he went after that. He was reported as a missing person.