48-year-old Saeko works diligently at a nursing facility. While performing a patient's sponge bath, she finds herself tempted by his body, eventually beginning to touch and stimulate him. Overcome by desire, Saeko closes the curtains and boldly uses her mouth to clean his penis. In that moment, her uncontrollable lust erupts—she strips off her underwear, straddles the man, and begins a new, intimate relationship.