Wen Mian is a primary school bully who has turned from a lively and cheerful temperament to a timid bully, while Qi Jing is a school bully who doesn't want to do anything. He is called "Qi Qi" in school, and the two accidentally switch.
In the process of exchange, Wen Mian regained his confidence, Qi Jing studied hard, and the two of them helped each other from being unfamiliar with each other. They are each other's only one.
Note: I am in school and will update when I have time.
Purpose: Helping each other