Ôoku ukiyo-buro (1977)

Starts with this one chick in a tight kimono—long black hair, slim but with a fat ass—grinding on some dude’s lap while another girl in a blonde bob starts making out with her. The room’s all dim and smoky, like a fancy brothel, and you can see the ink on the guy’s arm when he pulls his robe off. They’re all over each other, switching from kissing to straight-up fingering, and the camera gets right in there for close-ups of wet pussy lips. The tattooed dude ends up bending one of the Asian girls over a low table, doggy style, while the blonde rides his face—she’s got these thick thighs that clamp down hard. The other two guys join in later, tag-teaming the last girl, who’s got long wavy brown hair and takes it like a champ. Lighting’s warm but sharp enough to see every detail, especially when they switch to missionary and you get a good look at her tits bouncing.