Koi no karyûdo: rabu hantâ (1972)

Storyline:

Twenty year old Kazuo is in love with his college girlfriend, Hisako, but he cant help but be intrigued by a mysterious older woman named Kyoku, a promiscuous woman unsatisfied with her marriage As time goes on, both Kazuo and Hisako are pulled into the seemingly rules free, borderless world of Kyoku with all of its many pains and pleasures