Natsuko has been suffering from a sexless marriage, growing increasingly frustrated as daily fatigue piles up. One day, she visits a massage parlor with her husband, where a masseuse convinces her to try an oil massage. To her surprise, the session turns into a sexually suggestive experience. Overwhelmed by pleasure she's never felt before, Natsuko becomes captivated by the masseuse's skill. For a woman struggling in her marriage, could this encounter mark the beginning of something new?