Lately, married woman Yuko has been troubled by disturbing dreams, prompting her to seek counseling. The dreams she describes are strange and deeply unsettling. "I'm always in a red room, and there I..." she begins, recounting how in the dream she indulges in masturbation, being toyed with by an unknown man while desperately seeking pleasure. In the dream, she straddles the man herself, writhing obscenely as she greedily devours his thick cock. It might seem like mere sexual frustration, but Yuko's dreams run deeper, continuing to torment her. In front of the counselor, Yuko begins to confess something—an admission that exposes the dark secrets buried deep within her psyche.