Ayako was unable to have children with her husband, so she harbored deep affection for her nephew Ataru. Ataru, too, was captivated by Ayako's kindness and had developed a secret admiration for her. One day, Ataru began working near Ayako's house, starting a routine of commuting from her home while her husband was away. One quiet evening, Ayako suggested they enjoy fireworks together. As the night grew still, their hidden emotions began to bloom, illuminated by the glow of the fireworks.