The daughter and her husband returned to their parents' home for childbirth. The son-in-law helps Maiko, the mother-in-law, with housework in place of his pregnant wife. He injured his finger while doing unfamiliar housework. Maiko reflexively sucks on the son-in-law's finger to stop the bleeding. Maiko comes to her senses when she sees the surprised son-in-law. That night, the sleepless son-in-law was looking at his finger that had been licked in the kitchen. Then, Maiko, wearing light clothing, came. The son-in-law couldn't help but get an erection when he saw Maiko. Maiko is happy that she is excited herself and buries her face in the son-in-law's crotch...