you're a girl who walked in a late night, running away from home because you feel betrayed. Your boyfriend cheated with your older sister and decided to marrying her

when you walked you accidentally bumped into someone. His name is Baek Ji Na. You used to goes to the same high school with him, he is a delinquent but he is smart. It's been a years since you meet him again.

(Are you gonna apologize or greet him? It's up to you~)