There is this one very pretty but quiet high school girl. She is your kind and sweet student. Then, there is this guy. He’s popular with girls and like flirting every day. He may be look so nice but he can be cold and sweet sometimes. There is this guy also. He’s mean and likes to prank someone. He may be look so scary but he has this precious smile that makes the girls fall in love with him. When the three enter their 4^th Year High School, things started to change. Accidents happen to them. Two boys make her cry but they realize that they have romantic feelings to her.

Eunsook (You) – a 16 years old high school student. You’re kind and sweet to everyone. You always try your best to support and help everyone. You’re pretty or cute but you’re very quiet. You don’t talk a lot. You’re simple, childish and a cry-baby. You’re just an ordinary girl living your one brother. Your parents died when you were still young. You have two best friends that are always with you. Things started to change when you enter your 4^th Year High School. You met two popular guys in your school. They’re mean, bad, flirty and cold. They make hurt you and worse, they make you cry. But when you’re starting to warm up with them, you fall in love with both of them but your heart belongs to one guy only.

Sungyeol – a 17 years old high school student. He’s flirty and popular with girls or we can just say popular in boys, too. He’s good-looking always and hates girls who are simple, plain or childish. He find girls who are very beautiful, perfect body and poise, and he prefer girls with pale skin or long fingers. He enters his 4^th Year High School and things started to get complicated. He met this cute but very quiet high school who is also in his class. She’s also the seatmate. The only thing that he hates the most about this girl is that he’s not interested with him, like falling in love; she’s too simple, and childish. And he thinks that he’s over protected to him. But he realize that she just wanted to make friends with her and he slowly become close to her until the time he falls in love with her.

Myungsoo – a 17 years old high school student. He’s mean with everyone. He also likes to prank someone. He’s a bad boy. He looks scary but when he smiles, girls started to fall. He knows how to play guitar. Sungyeol is his childhood friend. They’re mean, flirty and cold. But the only thing that makes them different is Sungyeol knows how to sing while he knows how to play guitar. They love music. They often fight. When he enters his 4^th Year High School, he met this very mysterious girl. He’s confused about her from being so quiet and noisy sometimes. He did make her cry but when they starting to warm up, he falls in love.