36-year-old Chise Iori is a mother of two, celebrating ten years of marriage. By day, she works as a piano teacher, accompanying mother's chorus groups and teaching music at cultural centers. Her elegant figure and beauty often attract attention from older men, though Chise has always gently turned them down. That all changed one night during a marital argument, when she accepted a dinner invitation that led straight to a hotel—her world shifting in an instant. What began as spiteful retaliation and taboo pleasure quickly turned into an addiction to cheating sex. Though usually drawn to older men, Chise now finds herself craving sweaty, passionate, desperate sex with men her own age. Witness the hidden, lustful side of this seemingly demure piano teacher—a gorgeous, married milf hiding a wildly erotic secret beneath her innocent appearance.