After five years of marriage, my husband has developed a strong attraction towards his wife Aoi being taken by another man. He finds himself increasingly aroused by the thought of watching her have sex with someone else. To satisfy these desires, he discovers a membership-only Happening Bar where men can watch their wives be intimate with others. Intrigued, he decides to become a member and brings Aoi along under the guise of a 'study trip'. As they enter this forbidden place, filled with excitement and anticipation, he cannot help but wonder what lies ahead for them both...