La vampire nue (1970) (FullHDRip)

This one opens with a slim brunette in her 20s, totally naked, straddling a guy at an office desk. She’s got a pale, almost ghostly look to her — fits the vampire vibe — long dark hair, sharp eyes. He’s in his 30s, average build, brown hair, looks dazed like he’s been hypnotized. She rides him slow at first, grinding down hard every time he tries to sit up. They switch to the living room couch where two other women show up — one redhead, one blonde — both wearing lingerie, joining in. The guy gets passed around: blowjob from the redhead, then doggy style with the vampire while the blonde jerks him off in front. Camera stays tight during penetration shots, lots of close-ups on wet pussy and thrusting hips. The lighting’s dim throughout, moody red tones, gives it that cheap horror porn aesthetic but it works. No real plot, just straightforward group sex with a theme.