A lewd stepfather who has retired and is now free to join his wife

Mao was living a happy family life surrounded by her kind husband and stepfather. All that's left is to wait for the child to be blessed with children. These happy days seemed to last forever. However, one day, his life changes completely at the hands of his father-in-law. When Mao, who never dreams of her stepfather having a dark desire for him, reveals her defenseless appearance, her stepfather's attitude suddenly changes. "I wonder if this lewd guy will be tempted by showing me that way!" Suddenly, old desires bare Mao's fangs...