The story of Lee Jaemi, who moves in with her best friend and is 4 friends. Coming back from the states, Jaemi has had a rough past. Her parents died when she was 11 years old, leaving only her brother as her close family. 3 years later, 14 year old Jaemi was in a carcrash and loses her memory. Her older brother goes missing with no traces left behind. She meets Kim Junsu, a 15 year old boy who soons becomes her best friend who takes care of her in place of her older brother. Why did her brother go missing? Jaemi discovers that she has a dark past with one of Junsu's friends, but she can't help but fall for him.