Junta is a husband who lives with his pregnant wife. Since it was his first time giving birth, his wife's older sister, Akari, came to help her with the housework. In contrast to his childish and selfish wife, Junta falls in love with Akari, who is gentle and full of adult charm. In the meantime, Junta and Akari have a toast at home after a healthy baby is born. Akari gets drunk and misunderstands Junta as her husband...
