Wu Se of Haicheng No. 1 High School and her deskmate, Qin Ye, are neighbors and childhood friends who constantly bicker. After an unexpected accident, the two swap their exam abilities. Hoping to return things to normal, Qin Ye takes the initiative to tutor Wu Se, but all she wants is to preserve her peaceful everyday life. From resisting each other to standing side by side, they rediscover the warmth of their childhood, come to understand each other's choices and hardships, and find the meaning of studying anew. As they grow together, they realize that their feelings for each other are irreplaceable.