This book tells the story of a group of lively yet childish high school students such as Lin Ran and Su Qiao, who experienced small and big exams, friendship and misunderstanding, dream pursuit and loss in an extremely ordinary school. For three years, they laughed and laughed all the way, falling and getting up again. There were innocent fights with each other, but also panic and expectations for the future. They developed firmness and tenderness in the small world, and finally found their own unique light.