Eun-hee, who has just graduated from college, is about to get married to Hyun-sung, a college senior she has been dating for four years, and her life is wonderful. But one day she met Junxiu, her first love who dumped her four years ago and took away her brother Eunzai's girlfriend. What made Eunxi even more headache was that Junxiu turned out to be Hyunseong's best friend. From then on, her life has been in turmoil. How will this free-for-all game of love, family, and friendship continue?