Characters:

Han Sunhwa

A 17 year old girl who lives with her mom after her Dad left them for another woman. She only trusts Seungho, and believes that other boys are stupid, and only care about themselves. She believes in true love, and thinks that Seungho is her Prince Charming. She is acutally a very pretty girl, but hides her beauty because she thinks that Seungho is only interested in nerds. She is good at sports, and does her best to succeed whenever she has a plan in mind.

Park Jiyeon

She is the ulzzang of "Seoul Highschool", and is best friends with Sunhwa. She is also 17 years old, and is famous for her looks. She is a model for the brand "Etude House" and "BeanPole". She currently lives with her parents, and is neighbours with Sunhwa. She only has eyes for L, and is a big fan of "The Loners". She has a secret that no-one knows about, which lead her to fall in love with L. 

Jung Daehyun

A 18 year old boy who is the lead singer, and guitarist of the band "The Loners". He is very good at sports, studies, and is a cold-hearted person. He's a trouble maker, who loves to make fun of people. He's selfish, and doesn't like sharing his belongings with anyone. His closest friend is his band member, L. They both transfer to Seoul HighSchool after getting expelled from their old school for bad attendance.

L/Kim Myungsoo

A 18 year old boy who is the bassist, and sub-vocal and rapper for the indie-pop/rock band "The Loners". He is good in sports, and is a player. He flirts with everyone, and is known for his eye smile. He has a rough past, but forgot all about it once he started the band. He moves to "Seoul Highschool" with Daehyun, and becomes one of the most popular males there.

Yang Seungho

The student body president of "Seoul Highschool", and is 18 years of age. He lives with his parents, and is loved by everyone. He is ranked #1 in terms of brain, and looks until Daehyun comes by. He is one of the most popular guys in the school, and is labeled as the "nice guy". He is very friendly, and never hurts people. He has many friends, and has a sunbae-hoobae relationship with Sunhwa.

TaeTiSeo(Taeyeon,Tiffany,Seohyun)

The Queenka's of "Seoul Highschool", who hate Jiyeon and Sunhwa to the core. They only care about boys, boys and boys. They call themselves as "TaeTiSeo" and are wanted by all the guys in the school. They are super rich, and model for brands occasionally. They cause trouble for the girls everyday, and destroy anyone that comes in their path. Taeyeon loves Daehyun, Tiffany loves Seungho, and Seohyun loves L. The three are known for their y attitude, and annoying voices.

Bae Suzy

16 year old Model. Myungsoo's ex girlfriend, and model of brands: Forever21, Chanel, American Apparel, and more. Born & raised in Korea, and moved to America at the age of 14, but returned after two years to continue her modeling in Korea. Famous for her doe-like eyes, and is nicknamed the Nation's first love for her innocent beauty. She's selfish, but she's kind to the people she cherishes. 

Yong Junhyung

Popular 18 year old playboy at Seoul Highschool. His class are rivals against Daehyun and Myungsoo's class. Junhyung doesn't have many friends, and prefers to be alone. He's actually caring and kind, but he likes to hide his feelings. He also prefers not to talk to people he's not close with, and is fond of Jiyeon.

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Note: I have nothing against SNSD, its just that I needed some bad girls, and it just happened that TaeTiSeo fitted my requirements, of beautiful, popular queenka's. 

Credits to: squishy-one at Moiety Arts for the beautiful poster and background!