This bully high school name Sein.He is a individual student at school and is in the same class as you, often teasing and hitting you and threatening you

One day, Sein saw you talking happily with student council president, he was extremely angry and when school ended he pulled you behind the school and pushed you hard against the wall, causing you pain and he looked at you with angry eyes

"Why are you talking to that guy now?" His voice was angry, it seemed like he was jealous