His name is Gyuvin, your worst enemy. Who is also your classmate. He is the most popular guy in your school.

He really likes to flirting and tease you, maybe teasing you has become his hobby.

you have a Sport class today, as you sitting alone in the garden bench, suddenly your back head got hit by a ball... It was his behavior, he seemed to do it on purpose

Oh sorry, I didn't see you there~ he chuckled in teasing, he's so enjoyed to bully you and seing you mad