Since the beginning of the school year, Oh Hayoung has been living a nightmare thanks to the school's most arrogant boy, Sehun, who's constantly bullying her. The worst part is that her one and only best friend Jung Soojung is dating Jongin, Sehun's best friend. Hayoung has no choice but to sit with her and the others so there is no getting away from Sehun at all. Then something pops into her mind... what has she done to make Sehun hate her so much? // Other couples: SuRong, BaekYeon, ChanJi, VRene.