What if once a morning one member of CNBLUE disappeared? And what if they had to find a replacement till they find that lost member? It all happens when one tomboyish girl decides to join CNBLUE disguised as a man, to meet her favorite member YONGHWA. But the big question is: Will this girl be able to keep her identity hidden till the end? And what if CNBLUE members began falling in love? Will she be able to remain her secret hidden?