During her second year of high school, Tao Yuning transfers to a school in City A because of her father's job relocation. On the eve of the new school year, while shopping for clothes with her mother at a mall, she is chatting and laughing with her when she accidentally bumps into Lu Zhiyan, who is walking toward her. At the opening class meeting, the homeroom teacher introduces Tao Yuning to the class and assigns her to sit beside Lu Zhiyan. Quiet and reserved, with an outward appearance that makes him seem difficult to approach, Lu Zhiyan gradually begins to notice his lively and cheerful new deskmate. Meanwhile, through their everyday interactions, Tao Yuning gets to know her calm and earnest deskmate. They encourage each other, study diligently side by side, and promise to work together toward their dream universities, meeting and accompanying each other through the passionate days of youth.