Hako no naka no onna: Shojo ikenie (1985)

Starts with two hot white girls—one blonde with huge tits and a lower back tat, the other a brunette with nipple piercings—grinding hard on a dark bed. They scissor like they mean it, legs locked tight, faces all twisted up. Then the scene flips to a skinny Asian chick with short black hair stuck in a cardboard box while a jacked dude with facial hair kneels in front of it, going full roleplay mode. The box looks like it’s barely holding her, and the lighting makes it look like some kind of weird ritual. Later, the blonde and brunette are back, spooning on the bed, with the brunette fingering the blonde from behind while she moans into the pillow. Camera work’s solid—close-ups on the grinding and the box scene, so you see every detail. No fluff, just straight-up action with a mix of girl-on-girl and that box fantasy.