Splatter: Naked Blood (1996)
Original title: 女虐 悪魔の悦び
Splatter: Naked Blood is a 1996 Japanese-language horror movie directed by Hisayasu Satō, with a running time of 1h 16m. It stars Misa Aika, Yumika Hayashi and Mika Kirihara.
A scientist taints his mother's scientific experiment with his own drug that transforms pain into a pleasurable experience. Unfortunately for the three women involved in the experiment, the drug works a little bit too well.