With her husband busy at work, Mao Hamasaki finds herself unable to get the attention she craves. A big-titted, sexually charged gyaru wife, Mao begins indulging daily with her live-in father-in-law. One day, when her husband announces he'll be late again, Mao provocatively tempts her father-in-law. Unable to resist her advances, he gives in and starts craving her body repeatedly. As her secret affairs continue with both her husband and her father-in-law, strange changes begin to occur within Mao's body. What exactly are these changes, and how will they ultimately affect her? The story unfolds into intense passion and emotional turmoil.