My mother’s best friend Chisato comes to stay during the Obon holiday. Atsushi expects nothing more than an ordinary older woman, only to become instantly infatuated by her beauty. Every glimpse of her sweaty neck or low-cut cleavage sends his imagination racing. Unable to get Chisato out of his mind, the adult man sneaks into the changing area to spy on her bathing—but has the worst possible luck and runs straight into her.