Swearing to be the queen of romance novels, the single Song Mi Do encounter a young famous pianist, Xi Song during her summer vacation after graduating from high school. Xi Song has insomnia but accidentally discovers that he can easily fall asleep with Song Mi Do by his side.
Song Mi Do decides to use Xi Song as a model to create the sweetest romance novel to get into the Chinese department. Xi Song and Song Mi Do make a deal with each other and start sleeping together. Their dreams and romance blossom as they move forward together.