S1, E6: Xia Rui supports Nan Xi's dream of becoming a designer, and he meets Yang Yufei in the library. Yang Yufei confesses her feelings while borrowing books, and Xia Rui covers for Nan Xi. Teacher Hu discovers the letter and warns them. Nan Xi decides to remain in class 9, and Teacher Hu chooses to help him. Liu Bin misunderstands Nan Xi's intentions, while Xia Rui and Zhao Yishu defend him.