Sei kazoku (1971)

Dude’s got a drumstick in one hand and his dick in the other, jerking off like he’s about to bust. Then the scene flips—slim Asian chick with shoulder-length black hair, tiny tits, and a tight little body. She’s on her back, legs spread, while the black guy goes down on her like he’s starving. You get a solid close-up of her face twisting when he hits the right spot. Later, he bends her over near the window, doggy style, and just hammers her from behind. No fancy shit, just raw fucking with good lighting that shows everything. The guy’s got some chest hair and a decent build, not some gym bro but not skinny either. She takes it like a champ, moaning the whole time.