Aimi is a young wife with a simple face and plump breasts. She lives a modest but happy life with her kind husband Hiroyuki. However, due to the recent recession, Hiroyuki's salary has been reduced and they have recently been struggling financially... Not wanting Aimi to suffer, Hiroyuki has secretly borrowed money from a loan shark. However, the loan shark is actually a loan shark. Kudo, the president of the loan shark, visits the couple's apartment and suggests to the frightened Aimi that she can pay off her debt quickly if she works in the underground sex industry...