Kim Mi Rae is a hardworking student who is so friendly and nice but she's bad to bad people :P . She have 2 childhood bestfriends named Kim Namjoon and Jeon Jungkook. The sisters of her bestfriends hate her and she don't know why. Will Namjoon and Jungkook change just because of Mi Rae? Can Mi  Rae take the risk of what's happening to them? Can she solve the problem without hurting anyone's feelings?