Kana took maternity leave during the time of giving birth, living happily with her husband, their newborn daughter, and... her father-in-law. However, since becoming a mother, her sexual relationship with her husband has decreased, which disappointed her greatly. Her father-in-law did not miss this situation... One day when her husband went to work, her father-in-law offered to massage her, but in reality, he had much more in mind...