Ema (pseudonym), a 32-year-old resident of Tokyo, is a sad woman who plays the role of a wife who is well-received by those around her. Her true nature is a vulgar, obscene, sex-crazy sow... Why did she become like this? She moans like a pig and gulps down her aphrodisiac like crazy. A whirlpool of pleasure that you can never escape. A daytime encounter that the family doesn't know about. She feels a sense of immorality as she falls...