Lin Yizhou, Su Qianran, Zhou Haoyu, Tang Xin and other high school sophomores with different personalities experienced repeated failures and struggles on the youth stage of campus, and gradually realized the true meaning of friendship, dreams and responsibility. As the college entrance examination approaches, many tests on family, studies, and relationships are coming one after another. Under the guidance of their teacher, Teacher Zhao, several people faced their own growing pains and gradually found their way. In their youthful years when laughter and tears intertwined, they relied on each other and experienced the ups and downs of transferring schools, falling out of love, family changes, group competitions, etc. The book presents the most realistic growth and transformation of ordinary teenagers in a humorous and bright style, and finally ends on the eve of the college entrance examination and the summer of saying goodbye to the playground.