What happen when your sisters, your friends along with you are going to debut soon, but your manager wants you to start living with Infinite so you guys can be known faster. Can Sistar and Infinite really live together? What happen when your sister fall in love with the same guy you have feeling for? and thw worst part is- he feels the same way for her. What about Dongwoo? Liking Bora and she doesn't even see it....

  Can he save a grl with no soul, a girl who thought she can never love? Most importantly with all his hardwork, will it work at the end before she end her life?