Kim Jaejoong (17 years old)

Has a little brother (Kim Junsu) who always admired his older brother. The parents of the two died ten years ago and Jaejoong and Junsu had to go to the children's home and stay there until Park Sungwoo adopted them. Jaejoong is a good student but he doesn't know what job he wants to get for the future.

Jung Yunho (19 years old)

Has no siblings and lives in a apartment. He attends university but often goes to parties with his best friend Shim Changmin. A lot of people think he is a playboy but only Changmin knows that he wants to find true love.

Kim Junsu (16 years old)

Jaejoong's brother. He's always happy und can make people laugh.  He's a clever student, too and wants to good payed job, so that he and Jae could have a happy live.

Park Yoochun (20 years old)

Lived overseas with his mother for the previous eleven years and is now home again. He lives in a big house with his father who adopted the two Kim brothers. He's glad to have two new 'brothers' - he often feels alone. He goes to the same university as Yunho and Changmin.

Shim Changmin (18 years old)

Is Yunho's best friend since they were children. Mostly, he's someone who doesn't care about things but he can be a very kind person if he just want to. Secretly he's in love with Jaejoong (they met eachother at the childern's home, because Changmin is an orphan, too), but nobody knows about this.

Park Sungwoo (45 years old)

His wife left him years ago, but he's still happy with his only son, Yoochun. Since he saw how lonely his son was (because Sungwoo has a lot of work to do) he decided to adopt two childrens.

Note: Picture isn't mine!