"Facing the stirrings of first love and growth, we all want to leave something behind, but in the end, everything moves forward silently." Hong Guang, who is about to enter junior high, spends the entire summer idly wandering around his mother's swimming pool. As the summer is about to end, the sudden appearance of a girl brings changes to Hong Guang's monotonous and stifling life, and certain feelings begin to quietly emerge in his heart.