Lin Yu's three years of high school were a "small universe" with constant storms and endless laughter. The arrival of new teachers, transfer students joining classes, academic pressure and interpersonal disputes make Lin Yu and his best friends gradually grow up amidst challenges. On campus, friendship, secret love, misunderstanding, and struggle are intertwined. Humorous daily life is intertwined with sharp conflicts. In the end, they look back on their youth and gain growth in the face of college entrance examination and future choices.
