Lin Zhiyao, an ordinary but imaginative high school student, together with his childhood sweetheart Zhou Jinyan, his younger brother Lin Xinyu and friends with very different personalities, experienced the collision of friendship, the trial of love, family changes and the struggle of dreams in just three years of campus life. Every day is full of excitement and touching warmth, with laughter and tears flying at the same time. On the eve of graduation, they held a "rooftop party" to commemorate their ubiquitous youth, but they also embarked on completely different life journeys. The story uses humorous and compact narration to connect the gatherings and separations of young people, and eulogizes the youthful memories of a generation.