Shin Hye and Jong Hyun became step brother and sister early this year. He's a rebellious music fanatic, she's a nerd.

Whenever they were together, wars follow... until one holiday at their grandma's place, when their lives were changed forever...

Characters

Park Shin Hye (16)

Involvement at school: Member of the Science club

Hobbies: studying (if that can be counted as a hobby!), reading manga, fantasy and detective novels, solving the cases in the Mystery magazine and eating

Ultimate goal: to be a neurosurgeon

Lee Jong Hyun (17)

Involvement at school: None, but he is a member of CN Blue, a band consists of himself and his three great pals

Hobbies: playing guitar, composing songs, Tai Kwan Do, rock climbing and Call of Duty

Ultimate goal: to make CN Blue known national wide and to have his own album

Jung Yong Hwa (17)

Involvement at school: None, but he is the leader of CN Blue

Hobbies: playing guitar, composing songs, playing basketball, and Call of Duty

Ultimate goal: to make CN Blue known national wide and to set up his own music magazine

Kim So Eun (16)

Involvement at school: Member of the cheerleading club

Hobbies: cooking, cross stitching, sewing, classical literature, reading manga and dancing

Ultimate goal: to become a dietitian

Uee (17)

Involvement at school: Cheer captain

Hobbies: singing, dancing, shopping, hairstyling and lowering other girls' self-esteems

Ultimate goal: to become a kpop star