A son who resents his father's new wife, Yuki, for being unable to forget his real mother, takes out his frustration on her by pointing out every little mistake. However, Yuki starts to find pleasure in the blame and abuse that should be painful. One day, her son sees the stain on her panties from being soaked in torment and realizes she enjoyed it. The son then calls her a 'slut without chastity' and begins sexually abusing her, making her walk like a dog with a vibrator inserted.
