Since 2 years ago, Haneul has been teased by Chiwoo who is a delinquent in his school. In the opening day of third grade, Haneul meets his middle school friend Myeongho who was moved from other high school. From that time, his school life had changed. He gets close with new friends, goes out with a girlfriend, draws cartoons, and enjoys summer time. While he enjoys a new happy life, things are suddenly getting wrong. Chiwoo prepares revenge on Myeongho and Haneul’s other friend Minsik who falls in love with Myeongho’s girlfriend. They provoke Hanuel into a fight because he is an easy mark.
