Mi-Cha Haru Yamamoto is a sweet, kind and loving girl. She is half Japanese and half Korean. She moves to South Korea to live with her cousin Minseok and his friends only to find out that they are EXO. They all befriend with 2 members having a deep crush on her. Mi-Cha starts a new and better life in Korea; becoming famous for her voice and beauty as a singer/model. She befriends many entertainers like BIGBANG, 2NE1 and others.

But there is a mysterious past she had before coming to Korea which is the reason why she sometimes feel a bit uneasy with men and is very quiet, as well as being difficult to trust people. What could have happened to her and will her cousin Xiumin and EXO be able to help her get over her past?