Xu Yu was originally a male high school student when he left school after taking exams and encountered a runaway truck heading toward him. His consciousness began to blur. When he (she) woke up, he saw himself in the mirror as a female student and a college student. The female student was also named Xu Yu. Xu Yu accepted the memory of this body, but he did not expect that the original owner of this body was the eldest daughter of the Xu family. Xu Yao, the second daughter of the family, was controlled by Li Hao and killed the original owner, so he ended up in this body.