Lu Manman's parents loved each other very much, but Lu Manman's mother unfortunately passed away due to dystocia when Lu Manman was born. Lu Manman grew up slowly under the care of his father and grandmother. However, during the summer vacation when Lu Manman was transitioning from elementary school to junior high school, his father told Manman that he was going to remarry. Lu Manman could not accept such a blow, and was in a state of despair with no self-confidence. Her father felt very ashamed of her and helped her hide it from her strict grandmother. However, when the incident came to light, her grandmother learned about Lu Manman's declining grades. Her grandmother asked Lu Manman's childhood sweetheart Chen Guo (Wang Junsheng) to help Manman with her tutoring. Manman gradually came out of the shadow of her father's remarriage and regained her confidence. However, Chen Guo's family suddenly changed during the summer after he graduated from junior high school. Chen Guo's father had an affair and his parents divorced. Chen Guo, who had lived a smooth life since childhood, suffered a huge blow. Lu Manman's grandmother also died of illness during the summer vacation. Manman resumed living with his father, stepmother, and stepbrother. Manman successfully entered high school and spent the gloomy first year of high school. He gradually recovered under the care of his father and stepmother. However, his stepbrother gradually developed a different kind of affection for Manman. Chen Guo continued to recover under the guidance of his mother. During his first year of high school, he paid more attention to Manman and understood his feelings for Manman. However, Manman was immersed in sadness and could not extricate himself. Finally, Manman met the beautiful and cheerful Xiao Wan in her second year of high school, made a group of friends, and understood the beauty and true meaning of life. Gradually, she came to understand her feelings for Chen Guo, and the two finally agreed to get admitted to the ideal school together. But the feelings between friends are not clear...