Kaho (50) is in her 21st year of marriage, has two children, and works as an office clerk. She has been with her husband since college, dating since age 20 and marrying ten years later. Her husband is one year older, with strong libido and jealousy, which gradually shifted into a desire for control. A year ago, he developed a craving for cuckolding, his jealousy transforming into arousal. He began intensely longing to see her having sex with other men. After enduring a year of relentless persuasion, Kaho reluctantly agreed to his excessive demands—under specific conditions. As a result, her relationship with her husband took on a new and unexpected form.