45-year-old housewife Chiemi is left with nothing to do after her son moves out and her husband goes off for work. One day, Masaru, her son's former classmate who first initiated her into sex during his teenage years, suddenly shows up. That past encounter has left a lasting impression on him, and Masaru now seeks to rekindle their intimate relationship. Living in solitude, Chiemi's body grows increasingly hungry for desire. As a result, the two begin a new affair.