Jung Soo Jung/ Krystal

Shy type,looks cold outside but warm but changed after that incident she has a dream of being a song-writer and auditioned on M Entertainment as a producer but met that person she doesn't want to see again

Kim Myung Soo/ L

Leader of BC or Boys Century a boy group from M Entertainment kind but became arrogant he was still stuck in the past that he became cold that he still lingers for the past to comeback and he thanks fate for bringing her back

Lee Ho Won/ Hoya

Leader of Legacy a rival boy group of Boys Century that came from the same label M Entertainment he is a playboy and much more arrogant than L he is Krystal's childhood friend

Park Jiyeon

Member of T-ara whom is Hoya's ex and likes Myungsoo she often chases him but always get dejected but doesn't give up she has a y attitude and dislikes Krystal