Kim Taeyeon 

A stubborn, caring, and kind girl. But she's a dork. She is a poor girl who is not really smart but still can go through school because of her friends help, Yuri and Seohyun. Both of them are her friends since kindergarten. They cannot called as rich people since they have scholarships, which make them stay at school. At their school, _School, every year - only one student - who can school without scholarship and school fee. The school stay the rules like that since they don't feel it as disturb.
 

Jang Wooyoung

The Heir of Jang's Company. The grandchild of _School. Handsome, but a pro Playboy. Friends with Nichkhun Horvejkul and Jung Yonghwa. The Richest guy.

Kwon Yuri

A kind girl who cannot forget about her past, the pain that left because of his boyfriend. Poor too, work with Seohyun and Taeyeon in a cafe.  Can school because of scholarship.

Junho

A cute, handsome, rich, and kind guy. NOT a playboy like his other friends

Nichkhun Horvejkul

The principal's son and Horvejkul's Enterprises first heir. The second playboy at school.

Seo Joo Hyun

A smart girl who is very discipline. Since she is poor, she needs to work instead of only study. Her father has a bad habits : drunk and hit his wife and children. The eldest from three others sister that she has.

Jung Yonghwa

The heir of Jung's Coorporation. Also a bad guy, but use kind way to make girls give up.

Ok Taecyeon

Ok's Star entertainment heir. Like Yoona. He is Sunny's bestfriend.

Park Jae Beom

Park's Bar & Club Heir. Also Wooyoung's cousin. Move from America. The 3rd richest boy in the school

R-GIRL's :

Tiffany

The richest girl, also the leader of R-Girl. Wooyoung's girlfriend. She likes Wooyoung, but Wooyoung date her just because their status.

Jessica

An ice princess. She is rich, but don't like to show up. She warm in the inside, but cold outside. Wondering when she will find true friends that she could share all her problem with.

Sooyoung=like Nichkhun

Sunny=like Chansung

Hyoyeon= like Junho

Yoona=like Taecyeon

Victoria=like Nichkhun *Leader of Nichkhun's fans club*

Krystal

Luna

Others

Minho= Yuri's ex-boyfriend. Finally realize he is stupid, but it is too late.

Sulli= Never get tired to make Yuri hurt. *Addicted*

Chansung=Sunny's childhood friends. School at USA since ten years old.