One day, the Sugawara family's toilet breaks down and they have to get it repaired. But the mother, Naomi, suddenly feels the need to urinate. Unable to hold it in any longer, Naomi heads straight to the garden and urinates forcefully. Naomi feels refreshed, but her son witnesses her. The excited son then approaches his sleeping mother and starts touching her body. Naomi is surprised, but gradually begins to feel good...