Shojo sôshitsu (1965)

One of the girls has long black hair tied neatly, wearing a white kimono with red trim, and she’s the first to slide down on top of the other girl’s face while leaning against a concrete bridge railing. They eat each other out with close-up shots showing wet pussy lips and fingers slowly circling clits. The guy shows up later — early 20s, short black hair, slim build — and takes them both in a bedroom, one in doggy style with hard thrusts, the other getting facialized before he flips her over and cums inside. Camera stays tight during penetration, especially when the second girl rides him reverse with her back arched. Lighting stays dim indoors but clear enough to see every thrust and cumshot detail. The transition from outdoor tease to full porn is weird but works.