Fumi is 50 years old and lives with her son, supported by the income from real estate and a company left by her deceased husband. Despite her age, she possesses an extremely strong libido and uses her son as an outlet for her sexual desires—making him perform fellatio or serving as her sex partner. One day, her younger brother, who manages the company, suddenly visits. To celebrate their reunion after a long time apart, they drink and reminisce about the past. Old feelings reignite between them, escalating into intense sex. A voluptuous, mature mother with a rich, sensual body fully expresses her feminine allure. Her passionate demeanor captivates all who see her.