Yong Guk charecter is a cold boy cause he lost his mother  in accident cused by his father enemys, his father is a member of Mafiya(a group that commite craiminal ang ilegal things ). He has one sis who is liveing with her uncle in Bousan but, he lives in Soul with his friend and they made band called B.A.P!!!

Han jea hei is a pretty girl who lost her parent in accident and u live with your aunt in Bousan .she and her best freind ( Bang Hana) came to Soul for studying and u rent house there.