Hitomi, a housewife, and Shinjiro, a freelancer, have an affair. What started as casual sex turns into something more as Shinjiro becomes obsessed with Hitomi's mysterious aura. Unknown to him, Hitomi's husband approves of her infidelity because he enjoys cuckolding. One day, Shinjiro is forced to watch Hitomi and her husband having intense sex. As Shinjiro is stunned, Hitomi keeps staring at his face. "I get so excited when I see a man's sad face..."