Marina is a married woman for a reason. Her biological father passed away, and her older sister, who lives with her, was devotedly caring for her, but she was in trouble because her older sister didn't pay for her care. She fails at work and cannot talk to her husband, who works in a quiet job. There, she consults her co-worker Chitose, who recommends her to become a father. Marina takes it lightly, but the reality is not so easy... Marina is offered a job as a full-time housekeeper.