A guy discovers a magic potion which makes him invisible.
Hunks in Hedonism
The Erotic Ghost
The Erotic Witch Project III: Witchbabe
The Lord of the G-Strings: The Femaleship of the String
The Witches of Breastwick
The Beast
The Girl's Dead, Man
Recently, My Sister Is Unusual
Take Me
The Devil's Bloody Playthings