A car accident caused a girl who was originally timid about the world to put on a mask. She was used to disguising herself with indifference. Is her memory of the car accident true? When she meets the perpetrator's daughter, how should you face it? These all happened at Junyi University, what kind of journey she experienced from the first to the third year of graduate school, the boy who loved her, and the girl who she thought she was very familiar with. This is a story about growth, about love and redemption, and about unforgiveness.