Shin Ryujin has a flirty boyfriend who's having a massive crush on his college senior, Hwang Yeji. One day, she confronted the older girl telling her to stay away from her boyfriend which became probably one of the reasons why he broke up with her. With so much anger and hatred towards her ex-boyfriend, she took the dare to revenge as suggested by her close friends, and that is to snatch the girl her boyfriend was obsessed with. Will her plans of annoying his ex prevail? Or it will turn into a more catastrophic series of her love life?