After ten happy years of marriage, Ririko and her husband see their life take a twisted turn. Her husband has spent years working as an associate professor when university trustee Abe offers him a chance to become a full professor—but expects something in return. Hoping to win him over, the couple invite Abe home and serve him Ririko’s cooking. Her husband has barely relaxed at the sight of their pleased guest when Abe, secretly lusting after Ririko, pressures them into visiting a porn theater with him. Unable to refuse without jeopardizing the promotion, the couple later accompany him, with no idea what he has planned for the faithful wife.