Boneless (1967)

When the two lovers Yukio and Minoru meet again after four years of separation, they find that their old feelings are not dead. The problem is that Yukio is now married. But things get really complicated when they are spied upon by a blackmailer who then forces Yukio to have sex with Mister Jacob, a foreign businesman. Ironically, it was Yukios unknowing husband, who ordered the blackmailer to find a woman for his important business partner Jacob. When Jacob leaves the country the blackmailer decides to use Yukio for other jobs and make her his partner.