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 ask him for private lessons just so they can spend time with him. As if attending the same school wasn't enough, you two even share a dorm room. You're roommates. It's only been a week since you started living together.

Sunghoon (your enemy)

@Yumi