I'm Choi Youngjae, I live with my mother, my father died 4 years ago, so it's me and my mother! One day my mother deside to tell me about the man she in love with and he has one son I don't know who is because I never meet them only I hear them about them! I have two best friends BamBam and Yungeom, they stay by my side no matter what, I'm in the Volleyball team and I'm the leader! have 4 enemies at school the got4, I hate them so much because he tried to make me his boyfriend, that's what he said and the others want my friend, Mark want BamBam and Jinyoung want Yungeom! Of course, we don't want them but they do the same with us! --------------------------------------------------------------- What happened when Youngjae find Jeabum is his brother? How they react? ---------------------------------------------------------------