Mika, a faithful wife who is in her fifth year of marriage and seems to be at the perfect age to give birth, lives with her kind and hardworking husband Kenichi and his father, her father-in-law. A few times a week, the young couple have sex to make a baby. Kenichi ejaculates and sleeps contentedly, while Mika quietly leaves her bed. In the hallway late at night, her daughter-in-law has her lips roughly sucked by her father-in-law, who smells of old age. ...That's it. This is how her son's wife, who has reached the perfect age to give birth, is being creampied by her father-in-law as well...