A father-in-law who fell in love with his son's daughter-in-law, Nanako, who should never be interested. Nanako has a lovely smile and her slender body is attractive. Even though he knows it's a bad thing, he fantasizes about his son's wife's lascivious appearance. A daughter-in-law who masturbates to show off, a daughter-in-law who gently blows in the bath, and the delusion of the father-in-law grows steadily.
