Flora on the Sand (1964)

One evening, at the Marine Tower observatory, cosmetics salesman Ichiro Iki is drawn into conversation with an unfamiliar young lady Akiko. She invites Ichiro back to a hotel where they make love but part without even exchanging names. A week later, they have a second chance encounter at the observatory. This time, Ichiro is the one who pursues her. Back at the hotel, Akiko begs Ichiro to give her sister – Kyoko, a bar hostess – absolute hell. Akiko resents her sister for lecturing on chastity, while wantonly indulging in promiscuous activity. Ichiro takes an interest in Kyoko and sets out towards her bar…