Kind-hearted and gentle wife Kasumi Shirakawa willingly takes on the care of her senile father-in-law without complaint. During caregiving, the father-in-law repeatedly acts in unbearable ways—licking her body and making advances—but Kasumi always responds with patience and compassion. However, one day, her father-in-law, who should be incapable of erection, suddenly becomes erect and violently assaults her, penetrating her. Caught completely off guard, Kasumi is raped. Afterward, the father-in-law claims to have no memory of the incident. In Kasumi's heart, only a sense of guilt from the forbidden act remains, along with the troubling, lingering sensation of his cock. #Bangou P