Son Chaeyoung is a girl who lives in the street with nothing but pain. Meanwhile, Myoui Mina is a rich and perfect girl with no problems. One day, Mina meets her in the alleyway, unconscious. Although Mina is a brat, she realized that she has a soft spot for the girl. Chaeyoung got beaten up by a group of boys who forced to her and took all her stuff, her vision blurred as she saw a petite figure running towards before her turned into darkness. Mina denies that she's i