Okasare shigan (1982)

The girl has long dark hair and a tight, slim body — you see her lying on her stomach on a messy bed early on, hands behind her back like she’s posing. Then the guy shows up, also Asian, early 20s, short dark hair, more muscular build, and they start cheek to cheek on the pillows, face close, breathing heavy. She’s topless in one shot — small frame, visible nipples, not much coverage as she shifts on the sheets. They move to a couch after some makeout intensity, both shirtless, wrapped in a slow grind, her leg hooked over his. The standout moment is a close-up handjob — she’s stroking him slow with one hand, camera tight on her fingers and the base of his dick, dim light adds to the mood. Lighting stays low throughout, mostly close-ups, feels private, not staged.