Changminnie is the leader of F4 and heir to Shinhwa Group. As leader of the most popular and powerful clique in Shinhwa High.

 

Jaejoong is a member of F4 and the grandson of a former president of Korea. His musical talent catches Shim Hee-Young attention.

 

Micky is F4's Casanova. He is a skilled potter and his family owns the country's biggest art museum. He eventually changes his playboy ways when he realizes that he is inlove with Kim Sun-Hee.

 

Xiah is known as F4's Don Juan. His family runs a large construction company and has important connections to an underground organization, hinted to be the mafia.

 

Yunho is known as Xiah older brother..he transferred back from the states to Korea and became the greatest lawyer and a teacher of Hapkido. Also is now involved in the construction company.(note: Yunho is not part of the F4, he is  only Xiah's brother but don't worry he will appear in the story.)

 

Kim Sun-Hee known as Shim Hee-Young best friend. She is beautiful but she's more of a tomboy until she meets Micky.

 

Shim Hee-Young is known as the new girl attending at Shinhwa High School. First person to get involved with the F4. 

She first falls for Jaejoong but then realizes she's in love with Changmin.