Hitozuma maru-ura tōsatsu: Haitoku no jōkō

人妻(裏)盗撮　背徳の情交

Also known as Hitozuma maru-ura tôsatsu: Haitoku no jôkô, 不倫盗撮 暴かれた下半身, Furin tôsatsu: Abakareta kahanshin

Reiji, a young man who single-handedly runs an electrical shop inherited from his parents, has a hobby of secretly installing small cameras while repairing appliances and spying on other people's private lives. He then sells the footage to illegal businesses. One day, Reiji falls in love at first sight with Yoko, a married woman who comes in to change a light bulb.