Young-sook(PARK Bo-young) is the head of a high school girls' gang who dominates her country town, but she secretly longs for attention from Joong-gil(LEE Jong-suk), the legendary Casanova of Hong-sung Agricultural High. Meanwhile, Gwang-sik(KIM Young-kwang), the top bully of Hong-sung Technical High is mad over Young-sook who won't open up her heart to him. Then, a new girl, So-hee(LEE Se-young), moves down from Seoul and stirs up trouble in their relationships. Once he realizes Young-sook is troubled over Joong-gil who is intent on winning So-hee over, Gwang-sik eventually tries to harm So-hee. When Joong-gil steps up to stop Gwang-sik, Young-sook sacrifices herself without the slightest hesitation in order to save Joong-gil from Gwang-sik.