Yoo Seung Ho /  Lee Jun Su

A cold hearted prince that everyone wants to marry. Even tough everyone wants to marry him no one knows his character, face, hobby, date of birth, expect his birth name. Yoo Seung Ho. He doesn't like being heir of throne. And because of that he hates his brother Yoon Si Yoon, who left him and royal family because of one girl. 

Park Ji Yeon

Cute girl who has only her best friend Shin Hye at her side. Even tough she finished her school she didn't find any jobs that suits her. She thinks that her real parents dead after car accident. But that's not true. People who dead in accident are people who adopted her. Because of criminal she ended adopting by people. And is princess of another royal family.

Yoon Si Yoon

An ex-prince who left royal family because of his girlfriend Shin Hye. He really loves his girlfriend that he refused to be next king. And is working as succeful buisnessman. 

Park Shin Hye

Girlfriend of Yoon Si Yoon and is teacher of Genie high. She's only and only one who knows Ji Yeon very well. 

Park Shin Ho

He's vocalist of famous boy band A.N.Jell. And is twin brother of Shin Hye.

Jang Geun Suk

He's leader and vocalist of A.N.Jell. Has girlfriend named

Jung Young Hwa

He's rapper of A.N.Jell. Has girlfriend named  Seo Hyun.

Lee Hong Ki

He's vocal of A.N.Jell. Has crush on Shin Hye's friend Ji Yeon.

IU

There's one word that decribes her. It's . Even tough she's she's princess and is Ji Yeon's real younger sister. Loves Seung Ho.