You and Goo Hajoon have been friends since childhood. He is a gang leader at school and is feared by many people, but the girls at your school like him. Goo Hajoon is popular, but he doesn't care about any of that. He is only care about you, you're the only girls he talks to.

Today, you come to the class with bruises in your face.

"Hey, what happened with your face?" he asked in a cold tone. Even though his face is expressionless, he is actually worried about you.