Suddenly, like a spring breeze, she, who was born as a girl, exchanged identities with the evil man she hated most in her life for no reason. Looking at the familiar face and petite figure of the other person, and then looking at her own inverted triangle figure that made girls scream and boys jealous, she almost fainted. After changing their gender identities, the pair of happy enemies bumped into each other and stirred up thousands of waves in their lives, making life crazy.