A horny scientist who is married to a hot wife and lives with his virginal step sister invents a drug that can make him invisible. Erotic high jinks ensue.

• Nikkatsu Corporation
• Erina Miyai
• Maria Mari
• Teruaki Satô
• Nami Aoki
• Yuki Yoshizawa
• Jun Aki
• Izumi Shima
• Yûko Asuka