Yuka, who is undergoing infertility treatment through massage, is being taught the techniques by an extremely virile chiropractor. The sex treatment, which is a secret from her husband, makes her bolder and bolder. One day, her brother-in-law sees her treatment and seduce her into a relationship. Although she is confused, she readily accepts and starts talking dirty like a slut. It was all supposed to be for the sake of a happy marriage...