Yuto Yuria will live with her new father due to her mother's remarriage. Each of them had a secret job of customs, but one day, my father-in-law didn't know that and called them in a 3P course. Two people who look down on customs even though they have a mother. Meanwhile, Yu gets fired from her customs because of the recession. Yu, who is not earning enough, uses his father-in-law's love of customs and asks him to make full use of the erotic technology he has cultivated. And Yuria, who witnessed the sex of the two, should oppose her sister ....