Kôya no dacchi waifu (1967)

The guy has short black hair and a lean build, mid-20s, wearing just jeans in most shots. The girl’s petite with black hair to her shoulders, pale skin, totally nude in the sex scenes. They start on a bed in a dim room — he’s on top in missionary, gripping her neck hard against the wall before that. You see her on her back, legs up, taking deep thrusts. Later there’s a street scene at night, him pushing her against a wall under a billboard, one hand on her throat, clothes half-off. Indoors, the camera stays wide — you see the whole room, bed, a chair, natural lighting like daytime filtering in. No cumshot shown in the frames, just grinding, rough positioning, and constant physical control from the guy. The vibe’s raw, no music, probably amateur or gonzo style.