Momoko and her husband were troubled by the noise from their neighbor, artist Taniguchi's creative activities, and finally decided to confront him. They successfully reached an agreement, but in turn, Taniguchi became intrigued by the couple's private life. He invited himself into their home, targeting Momoko and seeking to uncover her hidden sexual desires. Roughly taken against her will, Momoko awakens to pleasures she has never experienced before. Though she verbally resists at first, his forceful advances dominate her body, gradually transforming her into a submissive female dog.