Under the camphor tree of Nanshui No. 1 Middle School, Zhang Bingzong, a sophomore girl, was attracted by Tan Biao, the ace of the track and field team in her class. The confused Zhang Bing often made jokes, but the seemingly indifferent Tan Biao silently cleaned up the mess for her: pushing his own books when he forgot to bring his textbooks, and speaking out to defend him when he was laughed at. During a heavy rain, Tan Biao took Zhang Bing home with an umbrella and confessed to her, and the relationship was confirmed within two days. Since then, the campus has been full of their sweet sights: buying breakfast together, taking a walk after evening study hall, and supporting each other while preparing for exams. After the college entrance examination, they agreed on the future under the camphor tree. This young but sincere love became the sweetest memory of youth.