On the first day of the second year of high school, Su Wanxing, an introverted and taciturn academic, accidentally spilled soy milk on the white shirt of Lu Yu, a well-known "problem boy" in the school. What I thought was the beginning of a narrow road between enemies, turned out to be something different with each encounter - when she was stuck with a problem, he would use scratch paper to write down alternative ideas for solving problems; she would secretly hand him a bottle of iced Coke when he was punished to stand in the corridor; he would protect her from the risk of falling at sports events, and after evening self-study, he would silently follow her to the gate of the community. When the throbbing of adolescence hits the label barrier of "students and scumbags", when family expectations and ignorant love pull against each other, they hide their thoughts in the notes in the wrong question book and express their true feelings on the windy playground on a summer night. This is a youth love song about growth and redemption, proving that the best love is to become a better person with you.