Seonwoo is about to get married, and his father collapses from a cerebral hemorrhage. Dad's huge hospital bill is granted to Seon-u, and his father has to be a basic pension recipient to solve the bill. Can Seon-u overcome this disaster-like situation and get married?
从高中就是闺蜜的两人上大学后一起在首尔租屋生活，家境普通的素真到处打工维持生活的同时，小康家庭的智妍在大学里因外表成为风云人物。 智妍因缺钱拜托素真介绍可以短期赚钱的工作给她，于是素真带着智妍到她常去的KTV陪酒，而智妍也因出众外貌使她越赚越多，然而这样的 工作多在晚上，所以智妍为了补眠拜托素真早上帮自己上课点名，两人的生活就像对调般，素真也渐渐的与智妍男友有了交集，三人的关系变得微妙，一场 变调的生日派对，两人的生活开始崩坏。
