Hitohira no yuki (1985)

Starts with them chilling on the couch, her in a robe that barely stays closed, him shirtless already. She straddles him on the bed, slow at first, then gets into it—good angle on her tits bouncing while she rides. Switches to missionary, her legs wrapped around his waist, him going deep. Later, she’s on her side, one leg up, and he’s eating her out like he’s starving. The lighting’s dim but you still see everything—her smooth skin, his muscles flexing. No crazy positions, just solid fucking with good chemistry.