Hina, who has come to Tokyo from Osaka, is sent to live with her uncle after her father can no longer raise her. One day, her drunk uncle impulsively pulls her into a tight embrace. Shaken by the incident, Hina sneaks into her new school during summer break to practice her self-introduction in the classroom. There, she meets the school's janitor, a man who once had strong feelings for Hina's mother. As memories resurface, he begins to see Hina as a reflection of her mother, awakening long-buried emotions. This encounter will come to hold profound significance for Hina.