A faithful and perfect girlfriend. A heartless and bad playboy. 

Why did these two even met? Because of this, the nice girl is hurt, while the playboy carelessly does his thing. In fact, Jung Heeyoung didn't care that her 'boyfriend', Kim Jonghyun, was cheating on her with different girls. Why? Because she loves her, alot.

A cool and mysterious guy steps into the story.

Heeyoung loves Jonghyun way too much. That's when Kim Myungsoo comes into the scene. He helps her, and actually cares for her, truly. Can Heeyoung be stopped by Myungsoo, or will her heart just be broken endlessly by Jonghyun, again and again?

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"Faithful Girlfriend" ; Jung Heeyoung

-- An honest, pure and lovable girl. She is very spoiled by both her parents, but the two adults just seem to focuse too much on their jobs. Sweet, very much faithful. What boy would want to break her heart? Kim Jonghyun. Who secretly loves her? Kim Myungsoo. 

"Heartless Playboy" ; Kim Jonghyun

-- Completely heartless, a playboy. Very good looking, yet, an ugly heart. Currently the Kingka of Yeongjun High. Involves himself to Heeyoung as her 'boyfriend' only for her wealth and popularity. A member of a famous group called SHINee.

"True Bestfriend" ; Kim Myungsoo

-- Cold and quiet to others, helpful and caring to his precious bestfriend, Heeyoung. Has helped her in many of her problems. Left Korea at the age of 9, came back at the age of 16. Loves Heeyoung and her only. Past? Currently unknown..

"The Playboy's Bestfriend" Kim Kibum / KEY

-- The second Kingka of Yeongjun, and also a member of SHINee. Jonghyun's bestfriend. Key is known for his very feminine face, like Taemin, his and Jonghyun's groupmate. His outlook of Heeyoung? Unknown..