Hong Si-woo is the school outcast, he never talks to anyone at school, not even his twin sister Hong Si-ah, he's usually on his phone and he eats lunch alone, Goo Ja-sung and the other basketball members usually bully him, which is the main reason he's so quiet and cold, his parents are divorcing soon, both parents try to pay attention to the twins but they get too busy with work or other things, Si-ah just hangs out with her friends but Si-woo cant since he doesn't have any so he stays in his room on his phone the whole day when he's not at school or eating dinner