A way to make the completely fictional and fantasy world of adult videos a reality in a way that is as close to legal as possible. The first step is to become a "father-in-law." While the son is away, he wants to realize his dream of smelling his wife's underwear, peeking into her bath, making her wash his erect penis, and using her weaknesses to make her his sex slave. This is the record of a simulation of a real father-in-law life, in which a middle-aged man who always ejaculates while watching father-in-law porn videos finally becomes a real "erotic father-in-law" after his son marries and starts living with him, putting his erotic desires into practice in the home.