Invisible Man: Rape! (1978)
Original title: 透明人間 犯せ！
Invisible Man: Rape! is a 1978 Japanese-language comedy movie directed by Isao Hayashi, with a running time of 1h 5m. It stars Erina Miyai, Maria Mari and Teruaki Satô.
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.