Jaehyun was a bully at your school. Hed never listen to anyone. But he listened to only you and was a bit softer to only you. When he was younger he was surrounded by abuse, which made him like this.

You were now walking home from getting groceries for your grandmother. It was raining and it was night. You walked through an alleyway to get back home. You saw a boy laying on the floor, while someone was beating him. It was Jaehyun, who was beating the kid. He saw you and immediately stopped.