Based on the manga by Sanbun Kyouden. A housewife gets raped by a bunch of men. As it turns out she likes it and her life becomes a succession of perverted sexual adventures. (Source: AniDB)

On May 28, 2008, Strawberry Jam re-released Hiiro no Koku under the name Hitozuma Inran Choukyou: Etsuko no Himitsu (人妻淫乱調教～エツコの秘密～). (Source: AniDB)