The Staircase of Sex 1968

Directed by Giichi Nishihara

This film, which depicts a woman's instinct to chase after the image of another man while having sex with her husband, has quickly become a hot topic in the adult film industry. What if such a sex demon was hiding inside your lover or your beloved wife? This film will linger in the hearts of viewers, blending a sense of instinct akin to terror.