A housewife who came to work as an underwear monitor is told, "Please leave some bodily fluid stains on the underwear to test its waterproofness," and "The reward will vary depending on the amount and quality of bodily fluids you get." The person in charge then leaves the room, leaving behind a large number of adult toys such as electric massagers, vibrators, and rotors. The housewife left in the room is confused, but in her mind she is filled with a desire for reward and an interest in the adult toys she has never seen before... We managed to spy on two housewives!