Yôkai bôkô (1981)

A ruffian and a vicious man team up to kidnap the wife and daughter of the president of a huge company. The men unleash their deepest desires upon the important wife and beautiful daughter. Trembling with fear, the women return to their sensuality, driven mad. Their pale skin turns red, their flesh moistens, and they begin to ask questions! And then, an unexpected ending awaits...