Chang Hanchuan, Chang Hanxue and Yang Luhe grew up together and are childhood sweethearts. In the second year of high school, the encounter with new friends Song An and Qin Yuan not only brought happiness to everyone, but also planted the seeds of a rift in the relationship between Chang and Yang. Xu Xing, a girl they met at a summer camp when they were children, will bring about earth-shaking changes to their relationship after they go to college.