Jessica Jung 

• Tends to be idle most of the time

• Doesn't care to anyone except her friends

• Loves Jaejoong which can be seen through her actions

• Lives with her bestfriend, Tiffany

• Her parents are living in the other country

Lee Donghae

• A transferee student

• Quiet, sleeps most of the time in the classroom

• Lives alone, his parents passed away when he was young

• Will have a crush on Jessica (?)

• Smart, excels in class

Kim Jaejoong

• One of Jessica's friend

• The most popular guy in the school

• Treats Jessica like a small sister

• Secretly loves Tiffany

• Top 1 in the school standing

Tiffany Hwang

• Optimistic, always happy

• Sees Jaejoong like a brother

• Rich, but does not brag about it

• The most popular girl in the school

• Lives with her bestfriend, Jessica