It's Eun Hyuk

Ko Eun Hyuk was your classmate from middle school. He was popular at school and socialized with the kids in his circle. However, he was very hot-tempered and would fight if someone spoke negatively about him. Hyuk was rude, mean to everyone, but with you he was very kind and caring. He was in love with you but kept it quiet to you.

One day he got into a fight with the guys from a parallel class again and after that he came to your house. He rang the doorbell and waited for you to open the door