It's been 7 years since she got married. She works as a sales representative at a life insurance company while being busy with housework and childcare. Recently, she noticed that she hasn't been seen as a woman at home or at work very often. Feeling lonely, she lied to her company that she was on an outside visit at the beginning of the month when her work was settled about six months ago and met someone she met on a dating app and had a relationship. Normally, she would be strangely excited by the thrill of a weekday afternoon while working and the guilt of betraying her family. Since then, Yumika-san has been stuck in the swamp of adultery. Today is the long-awaited beginning of the month, and she, who has slipped out of the company, will spend a lewd and special time.