The female protagonist is called Qing Xiaoyi. She is the only daughter of the Qing family, the leader of the four major groups. She transferred to another school in the second grade of junior high school. Later, she fell in love with the male protagonist Ye Xuanyu at a sports meeting and secretly became a nymphomaniac. However, due to family entanglements, she was engaged to her childhood sweetheart, Senior Mu He, while Ye Xuanyu was engaged to her cousin Lin Mo. Ye Xuanyu broke Qing Xiaoyi's heart on her 15th birthday, causing her to no longer love him but to become very rational. He fell in love with her secretly, but she had given up. . . .