A new mother who suddenly made it a year ago. A son who is confused by the introduction of his young and beautiful mother-in-law. while his mother-in-law, Karada, was greedy and his son's appetite was full... One day, when I was thinking of leaving the house instead of limiting, my family decided to go on a hot spring trip. At a hot spring inn, the son's patience is limited, and he sucks up the breast of Akari and inserts the shade without being relentlessly. Even though he was indebted to his son, even if he knew that he could not do it, he was taken by the pleasure of shyness and invited his son Chimotsu himself. It is a story of mother-child sojaku, who is forbidden to make mistakes only for one night.