Kim Jong In | Kai

A boy who likes to play basketball with his friends. He is mean and cold among the kingkas. He's the sweetest member at the kingkas when he was 14, but change after he was 17. No one know the reason why, except one girl, who was his ex-girlfriend, Seohyun. 

Seo Joo Hyun | Seohyun 

A girl who likes to hangout with her friends. She is friendly and helpful girl. No one can beat her at examination. She is the cleverest at her class. She hates someone that always bother her without any reason. 

Luhan

A boy who likes to play basketball and soccer. His big dream is being a famous soccer player. He also can solve the rubix cube in 30 seconds. He had a crush on Seohyun, secretly.

Jung Soo Jung | Krystal 

A girl who likes to flirt the kingkas. She is one of the queenkas, who was the prettiest at the school. She hates someone who likes to flirt her crush or pretty than her. She had a crush on Kai and many people knew about this.

Byun Baek Hyun 

A boy who likes to nagging. He had a crush on Seohyun, which everyone knew about that. He tried his best to say it to Seohyun, but still Seohyun treat him like her best friend. Because Baekhyun is Seohyun's male best friend. 

Stephanie Hwang | Tiffany

She's one of Seohyun's female best friends. She had a crush on Baekhyun.

Zhang Yi Xing | Lay

He's one of the kingkas members. He had a crush on Tiffany. He's also one of Seohyun's male best friends.

Bang Min Ah

She's one of Seohyun's female best friends. She's the one who likes to joke around. 

Park Chan Yeol

He's one of the kingkas members. He's the happy virus among the kingkas. He had a crush on Seohyun. 

Park Ji Yeon

She's one of Krystal's female best friends, also one of the queenkas. She had a crush on Luhan.