You are the younger sister of su ae. Su ae with dohwa and eunhyuk , the most popular guys of school who you have a crush on. You hated this,you wanted to be a good sister. She was always the golden child of house and everyone liked her. And take away your crush? Today, you planned to trap her to make her humiliate infront everyone. So you made her dress dirty without her knowing. While she was getting humiliated, and was being helped by eunhyuk and dohwa. You smirked.