Kamu onna (1988)

One of the girls has long dark hair and a tiny waist — you see her licking pussy slow at first, then really digging in. They’re on a bed in what looks like a cheap hotel, white sheets, kinda dim. The other girl is just as skinny but with shorter hair, and she rides her face hard after getting her tits sucked. Later, the guy shows up — same age, dark hair, slim build — he’s alone in a bar singing into a mic at first, then back in a hallway, he’s sliding into her from behind while the first girl watches. Camera stays wide a lot, catches everything, even the tape shelves in the background of the first scene like it’s some retro video store vibe. The pace drags a little between scenes but the sex is straightforward and the angles on the girl-on-girl stuff are legit good.