Akari lives a carefree married life with her kind husband. However, she has one complaint - living with her vulgar father-in-law. When her husband is away, Akari falls asleep, tired, and her father-in-law takes advantage of the absence of his son and worships her firm breasts and the depths of her glossy black bush. Seeing his daughter-in-law's private parts, the father-in-law turns into a beast in heat and sets his sights on the young female living under the same roof.