Satsuki and her mother, Misuzu, live in a quiet, rural town surrounded by nature. Satsuki, a high school senior, spends her days focused on college entrance exam prep, but she lost important memories due to an incident three years ago. That same event deeply affected Misuzu, and the two have never been able to discuss its truth. The desire held within Satsuki's fragmented memories was, in fact, her own longing. Three years later, as Satsuki, Misuzu, and that buried wish intertwine, the fate of the three begins to shift.