On the first day of the second year of high school, Su Wanwan, a "little sun in liberal arts" who was very partial to subjects, was forcibly arranged by her class teacher to sit at the same table as Lu Xingchen, the "aloof scholar" who was number one in the grade. The euphemistic name was "mutual learning." At first, she thought he cherished words like gold and was unkind. He bothered her secretly drawing cartoons in class and asking questions. Until Su Wanwan accidentally bumped into Lu Xingchen feeding stray cats on the rooftop, Lu Xingchen discovered that she used comics to record the warm moments of the class, and the iceberg gradually melted. He helped her with math, and she took him to experience the "fireworks atmosphere" - the sausage stall at the school gate, the comic exhibition on weekends, and the cheering cheers at sports meets. The analysis of wrong questions hidden in the exercise book, the anonymous note sandwiched in the comic book, and the umbrella we held together on a rainy day made secret love sprout quietly between the desks. Just when the two of them were about to break through the window, Lu Xingchen's "pressure of competition for top academics" collided with Su Wanwan's "preparation for liberal arts competitions", and the beauty of the next class deliberately disrupted the situation, causing misunderstandings. In the end, with each other's encouragement, they broke through the bottleneck. Not only did they pursue their studies in both directions, but they also held hands in school uniforms and officially announced at the sunset of the graduation season: "My youth begins with my deskmate and continues for the rest of my life."