Shisenjó no aria

Kyoko is member of a club, The Bedroom. All the girls there use hallusion, a highly hallucinatory drug, and then let the men do what they like with them. Kyoko has separated from her husband Akihito and spends most of her time with her lover Kei, with whom she also has an erotic video correspondence. When the women in the club are killed one by one, Kyoko suspects Kei, after seeing one of his video letters. When she is about to succumb to hallusion with him, Kyoto's ex turns up. He shows several video tapes made by the security cameras showing who killed the women.