How is it like to live in Korea as a single woman in her thirties? People probably think of luxurious lives with high salaries and professional careers like those in dramas and movies. However, it is totally different in reality, and this drama portrays single ladies in the real world. This drama contains romance and friendship of three ordinary women named Jin Jin, Ah Reum, and Sang Hee in their thirties who have been living in the same neighborhood since childhood. Jin Jin is one of the most popular celebrities who is loved and desired by all Korean men. Little do they know, Jin Jin has never dated anyone in her entire life before. Then, she suddenly encounters her crush from back when she was young, Gong Ji Won. And once again, the two start a relationship but with the innocent hearts that they had when they were young.