Seung Wook and Ji Won have been dating for 6 years and they are about to get married. However Ji Won is upset at Seung Wook's unenthusiastic attitude towards their wedding. One day, Joon Ki, who used to like Ji Won and Ji Won meet by coincidence. Ji Won gets confused who to choose. And one day, she finds something her late father left behind and finds out about what happened between her father and Seung Wook. Seung Wook and Ji Won face so many obstacles while preparing for the wedding. Will they be able to get married?.

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.