Story summary: When Jinnian was 15 years old, his sister unfortunately disappeared. His mother, Wenqin, couldn't bear the blow and suddenly went crazy. She shouted for her daughter every day. Her son, Jinnian, blamed himself for not picking up his sister. At the same time, it was too painful to see his mother like this, so he put on his sister's clothes and pretended to be a woman. Several of Jinnian's close friends knew about this situation and they went to college together to keep this secret for him until they met him.