The young and frivolous Yu Chijuan has always been a popular figure in the school and is very popular among girls. However, unexpectedly, he falls in love with an ordinary girl. In order to pursue her, he even put down his dignity and asked the talented Yan Xiao to write a love letter for him. But he didn't expect that her usually careless and manly smile would have been secretly in love with him for three years. Under her seemingly straightforward and strong appearance, she hid a gentle and fragile heart. When he was enjoying the sweetness of love, Yan Xiao could only hide in the dark and bless silently. It wasn't until another boy appeared next to her that he realized how important Yanxiao was to him. However, as a young man, he didn't know how to deal with the emotional pain, so he could only say goodbye with regret. An encounter many years later brought back memories of his youth, but this time, could he catch her?