The House of Confinement: Torture and Humiliation 2008 one on netflix

Sachio was camping with his fiancée, Kiko, in the lush mountains, enjoying uninhibited sex even in broad daylight. That blissful time was shattered when a bizarre-looking man and woman suddenly appeared. When Sachio regained consciousness, he found himself bound to a chair in an unfamiliar room. As he worried about Kiko’s safety, Sachio heard sounds from the couple. Voices that could be described as neither pleasure nor pain…