Kaho is a submissive wife living with and caring for her seemingly senile father-in-law. She initially uses him to satisfy her own desires, but after ejaculating he suddenly regains his personality and masculine vigor. Declaring that he will impregnate her in place of his disappointing son, he pounds the neglected wife with a remarkably powerful cock until she submits. Their roles completely reversed, the pair lose themselves in an endless creampie affair.