After three years of marriage, my husband has developed a strong attraction towards his wife Yuriko being taken by someone else. He finds himself increasingly resistant to having sex with her due to this newfound fetish. One day, he discovers a membership-only happening bar where men can watch their wives being intimate with others. Excited by the prospect of fulfilling his desires, he decides to become a member by bringing along a partner. Reluctantly, Yuriko agrees to accompany him on a 'research trip', not knowing what lies ahead at this forbidden establishment...