Da Eun works part-time and Kim Byul is an idol. These two girls who look alike decide to change each other's lives just for 7 days. And now 1 year later, they decided to change one more time because of one event! A special one week is about to start anew.

Da Eun works part-time and Kim Byul is an idol in her 5th years since debut. These two girls who look alike decide to change each other's lives just for 7 days. It tells the romantic encounters of these 2 girls.