Characters:

Lee Jonghyun: 

Jonghyun had blackbelts on Judo and Karate. He is guitar freak, guitar is his girlfriend. He's Seohyun's cousin. He's the one who introduced Seohyun to Yonghwa and set them up. And he was never courting any girl and found girls are really pathetic. He's the most coldest guy at the school. He seldom smile. He usually hangs out with his fellow band mate, his best friend, Yonghwa, Minhyuk, Jungshin and his cousin Seohyun.

Im Yoona: 

A spoiled girl, living in a luxurious style. All the things that she wants, she can get it with a light hand. Daddy's little girl. Ranked as number one heartbreaker. She is the vice president of Student Council. Seohyun's bestfriend. She has many fanboys including Jonghyun's bestfriend, Jungshin who really fancy her. She spotted to hang out with her other 8 best friends. She formed a group dance named Girls' Generation.

Jung Yonghwa: 

Jonghyun's childhood friend. He's quite childish and has a good sense of humor. The vocalist of  CNBLUE, as the fangirls conclude that he is the Prince Charming. He is school's trouble maker along with Minhyuk and Jungshin. Currently in a relationship with Seo Joohyun or Seohyun.

Seo Joohyun:

Seo Joohyun aka Seohyun for short is Jonghyun's lovely cousin. She is shy around people she don't know. She is the smartest girl in her class, making Seohyun had to skip her current class and moved to senior class. Currently dating Yonghwa. 

PS: ANOTHER CHARACTERS WILL APPEAR SOON, DEPENDS ON THE STORY.