Sunny is a clever girl. She don't know her real mother father because she's adopted. She's been adopted by a middle class family. She went to high ranked private school because a scholarship since she's clever.

Hyoyeon a rich girl but pretend she's middle class. She is a bright funny girl but change after her parents die. She only move to Korea from Paris. She's extremely clever. She's very quiet.

Taeyeon is a nice rich girl. She has no friends because of her low profileness. She's bright dorky but a little dumb. Know Hyo's secret.

Jessica is Hyoyeon's childhood friend who is married early becuase of family business. Live in the US with her husband, Jay, who is older 7 years than her. Come to Korea to meet Hyo.

Kyuhyun is a cold rich boy. Too clever brain. Love by girls but he don't mind. He hates people who say no to him. He's also very quiet.

Doojoon is a genius. But, when come Hyo and Sunny he dropped. He's extremely angry because of that. He's playful funny and bright. A playboy too.

Wooyoung is a spoiled rich boy. He always keep his genius appearance. Cute, fun and always happy.

Tiffany or Hwang Mi Young is the school DIVA. She always get what her want. Rude, always think that she's the best.

Sooyoung is a bright girl. Friends with Hyo, Tae ans Sun. Tiff's enemy.

Siwon is Kyuhyun's brother. He liked Sunny from the first sight. (The story will be revealed soon) Heart-warming and nice.

Eunhyuk is Siwon's and Kyuhyun's cousin. Only back from America, New York. Like Hyoyeon.

Jay Park is a rich guy who is Jessica's husband. He loves her so much. Live in the US.

and more..