Erotic Slaughter: A Gun Barrel on the Lips(2000)

A series of mysterious deaths of middle-aged men occurs. The culprit is Sho. Her method of killing is brutal: she disguises herself, lures the lustful men, and kills them in the middle of sex. A detective becomes suspicious of the relationship between Sho and her father, and as he investigates, he discovers that the reason Sho has become a killing machine lies in her past...