Seeing his daughter-in-law Asahi Mizuno being neglected and indifferent by his son, the father-in-law felt sorry for her. Although she was beautiful and alluring, her husband never paid attention to her, only working and then coming home to lie down and sleep, leaving her abandoned. The kind father-in-law found a type of massage oil to help her relax, and he offered to assist his daughter-in-law, but she did not know that behind this help was a sinister intention.