My father-in-law, who has begun to have dementia, misunderstands his wife Satsuki as his late wife and kisses him. My husband is also troublesome, so I leave my father to Satsuki. Satsuki had no choice but to take care of his father-in-law. My father-in-law who is rampaging because of dementia is forced to hold a penis. Gradually Satsuki begins to love this relationship and licks the penis deliciously. At that time, I was found by my husband who came back from work early.