Misoji tsuma: Komitsuna yoru no go-hōshi

Original title: 三十路妻 濃蜜な夜のご奉仕

Although their married life is going well, Noriko and Daisaku are starting to have differences when it comes to their sexual activities. One day, Daisaku's father, Yusaku, shows up. Noriko doesn't like Yusaku, who is known for sexual harassment. Daisaku is infatuated with Mizuho, ​​a door-to-door saleswoman, and when Noriko returns to her parents' house...