Zhou Xiaojuan is an ordinary high school girl who is silent, introverted, stubborn and even has a bit of low self-esteem. One day, she helped her grandfather collect scraps and accidentally discovered an exquisite wooden box. With curiosity and desire to explore, she opened the wooden box and learned about the youthful past of the girl Ji Ruan. Just as she was immersed in Ji Ruan's world of youthful love, a sunny and optimistic boy was transferred to her class and became her classmate. One day during recess, she accidentally knocked over his reference book and saw a strange but familiar name. Her first words after talking to him about her deskmate for half a month were, "Why do you have Wan Jiayi's book?" Chen Hao sarcastically said, "I thought you couldn't speak." Youth is over, where will the love of youth go?