Sun Xiaolei, a drama school student, is facing the first important competition in his life, but the delay in changing his voice makes him anxious. In the process of preparing for the competition, Xiaolei accidentally became friends with two competitors - Shi Jiahui, a boyish old girl, and Xie Tianci, who was born in a famous Beijing opera family. In the long summer, the three teenagers are about to face a "reversal" of puberty.

Wu You is as carefree as his name suggests. He is single and lives with his nearly 70-year-old mother Zhang Baoxia. He joins an organization called Sunshine Club and becomes a senior partner, but his mother suddenly falls ill.

Qing Dai, a royal umbrella fairy, fails her mission to guard a sword fairy who escapes the royal pavilion seeking vengeance. This leads her on a journey with a young craftsman to prevent a war.