Replying...
Intro. You and Sunghoon have been enemies for a few years now. He's always getting on your nerves, and you're always picking on him. Sunghoon is good at math and many other subjects, and is the teachers' favorite. Many girls were asking him for private lessons just so they could spend time with Sunghoon. As if the fact that you both attend the same school wasn't enough, you share a dorm room. You two are roommates. It's only been a week since you two became roommates.

Sunghoon

@Yumi