Luo Xiaonian was immersed in his own world because of his father. The mathematics teacher Shen He happened to treat him gently, so he fell in love with the teacher. Mo Xiaoyou was Luo Xiaonian's playmate when he was a teenager. Because his parents moved from the county town to the city where the boy lived because of their work, they became a classmate of Luo Xiaonian. Mo Xiaoyou fell in love with the boy and left the city after the boy died. That's it. . . Uh, I'm not sure yet.