The Orgasmicon

Ever since she was a little girl, Kristy had been forbidden from entering the attic of her parent's house. She and her two high school friends let their curiosity and taste for adventure get the better of them, they sneak up and discover a dusty old book containing supposed chants that might summon all manner of perverted demons from the ether. When nothing happens to them, they get bored and leave the book on the side to collect more dust. However, later that night she is visited by a horrific tentacled creature that pins her to her bed and gives her tremendous pleasure.