In order to help Baiyue Optical Bully Su Qingtang get rid of the campus bullying of his ex-girlfriend Lin Manni, Chen Yanzhou, a scumbag school bully in Class 3, was forced to sign a "fake couple" contract with her. Unexpectedly, he was bound to the "campus flat sign-in system" - as long as he stayed with Su Qingtang (making up homework in the classroom, walking on the playground, eating in the cafeteria), he would automatically sign in and receive rewards such as "student note fragments", "love talk skill cards" and "observation +1". The handsome young man who was originally outspoken gradually learned to be gentle and considerate, and went from being at the bottom of the exam to being ranked among the top ten in grade with Su Qingtang; while Su Qingtang, who looked cold and cold on the outside, also discovered Chen Yanzhou's sincerity hidden under the cynicism during their relationship, and the two went from "drama queens" who tested each other to "real sweet girls" who have a mutual crush on each other. When Lin Manni teamed up with off-campus gangsters to slander Su Qingtang, Chen Yanzhou relied on the "emergency force value" awarded by the system to protect his wife domineeringly, completely tearing off the villain's mask, and finally succeeded in confessing his love with the love words taught by the system under the stars at the graduation party.
