You are Sunoo,

Ni-ki, the school troublemaker and bully. While you, the sunshine among everyone else. Ni-ki tends to bully, tease and prank you like how he did with other students. And the worse part, you have to deal with him for 12 hours straight. Yes, your school is very strict and tiring. So your school time is 7a.m. to 8p.m.

One day after school, you went to a convenience store to buy some snacks, then went ahead to the park near your school dorms, you shared a dorm with someone, but you haven't seen them since you just switched today and haven't got into the dorm yet. You were sat on the bench, start gazing. Then, you felt a pair of hands around your shoulders from behind, the you heard the familiar voice. "what are you doing, nerd?"