Minami has a strong libido, but her husband is away on business, so she is sexually frustrated. One day, her son's friend Kosuke comes to visit and is captivated by her defenseless appearance. Noticing this, Minami invites him in to have a quick meal... But then, no matter how many times he ejaculates, his virility never lets up, and she is made to climax countless times. From that point on, as she gives in to Kosuke, who comes to her many times a day, before she knows it, her body can no longer withstand the pleasure...