A happily married couple struggled with infertility despite their blissful new life together. Satomi, the devoted wife, cherished her love for her husband and found contentment in their bond. However, their peaceful existence took an unexpected turn when her husband invited his widowed father to move in with them. Upon accepting this arrangement, Satomi soon found herself drawn into unforeseen circumstances. The lecherous desires of her lustful father-in-law would come to profoundly alter the course of her life.