Mom friend's child is being trained ~A super masochistic other woman's wife's best body is my sex toy~

After eight years of marriage, Takanori quit his job and is trading stocks at home. The couple's nightlife has stopped and they are living a life of frustration, when their wife brings her mom friend, Saiko, home. Despite his pure and innocent appearance, Takanori senses a masochistic personality that attracts men. Since then, Takanori has set his sights on Saiko, who has been coming to the Yatsuhashi family frequently, but assuming that his wife is not around, he forces her to just push her down...