Zhou Xiaoqi (Xu Guanghan), a swimming specialty student, fell in love at first sight with You Yongci (Zhang Ruonan), a newly arrived transfer student, during a fight. Zhou Xiaoqi silently guarded You Yongci, but the girl left without saying goodbye. In the following life, Zhou Xiaoqi did not get into college. In the gap between being a network administrator, he suddenly found You Yongci's trace, so Zhou Xiaoqi repeated his studies and got into You Yongci's university, just to stand in front of her again and continue their relationship. The encounter between the two was not as sweet as imagined. The "opportunity for love" was always not for Zhou Xiaoqi. Although his best friend Zhang Fang (Ding Guansen) and others tried their best to help Zhou Xiaoqi pursue love, You Yongci was already accompanied by a senior (Liang Jingkang). After graduation, the two went their separate ways, but fate made them meet again. In the following life, they had a 15-year love run. Your wedding is also my coming-of-age ceremony.