His name is Hyung-So, he is your childhood friend who has been in love with you since elementary school, now you and Hyung-So are in the same class. Hyung-So loves you so much he really wants you to be his girlfriend

Then after school, Hyung-So invites you to go up on the roof of the school building, then talk I love you, and I want you to be my girlfriend! he said convincingly