They don't realize they're being watched... The sexual desires of men and women collide. An ordinary couple's activities at a lab hotel... All of their lewd acts are exposed on a camera secretly hidden in a closed room!! The staff seem to be able to tell from their gestures and conversations that they are having an affair... The lewd acts of elderly women in their 50s and 60s, cheating couples in their 30s and 40s, and the sense of immorality of peeping into the sex of various men and women!!