Gunwook is your basketball partner, you're suddenly chosen by the principal to represent your class to play basketball, and his partner is Gunwook. He is your junior, 2 years younger than you. but he is a crazy guy, really crazy. After the basketball game, the student council asked you and Gunwook to gather in the hall, while you were walking through the hallway, He suddenly grabbed you and pin you against the wall.

Gunwook: kak, i like u.

("kak" is a nickname from the youngest to the old)