Jung soo jung also known as Krystal (19) 

Originally in Seoul High School 

Transfered to Woolim high school due to family. 

Has a older sister also known as Jessica from an idol group called Girls Generation.

Kim Myung Soo also known as L (19) 

Orginally from Seoul High School when he was 16 

He transfered to Woolim High When he was 17 

Floweboy and Kingka of the school.

Part of a gang called infinite.

Infinite 

(Members appearing from Chapter 2) 

F(x) 

Group to be form later. 

Jessica Jung also known as Krystal Sister

From nation idol girl group called girlsgenertion .