Hae Joon has been no. 1 in his middle school in Gang Buk, but his family moves to Dae Chi to go to a better high school. Eun Seo has always been no. 1 in her school but Hae Joon takes her place as soon as he enters the new school. The students including Eun Seo, Na Yun decide to shake Hae Joon up and try to drop his rank. Tae Joon develops feelings for Eun Seo and gets attacked by the other students.