Sêrâ-fuku: Yurizoku (1983)

Sera’s the first one you notice — petite, black hair cropped short, wearing a tight sweater that shows off her small tits. The scene starts in a diner during the day, both of them sitting across from each other, legs brushing under the table, hands creeping over thighs. It’s not long before they leave and head somewhere private, ending up in a dim bedroom with a mirror on the wall. Clothes come off quick. Yurizoku’s taller, got a thicker build, and she’s all over Sera once they hit the bed. They go from kissing to grinding, then straight to fingering — close-up shots show how wet Sera gets fast. Camera catches the reflection in the mirror while Yurizoku eats her out, tongue working hard, fingers pumping from behind. Later, they switch positions, Sera on top, riding Yurizoku’s face with her ass bouncing each time she leans down for a kiss. The bedroom setup’s basic but effective — dim lighting, mirror angle, and zero distractions from the sex.