Oba Nana is the middle child among three sisters. She is 29 years old, single, and works hard at her job. She receives a promotion at her job to become the youngest assistant manager, but she feels anxious due to her friends getting married and having children. Her two sisters are 39-year-old Narusawa Mutsuki and 19-year-old Oba Hatsumi. Narusawa Mutsuki works as a certified accountant. She is currently separated from her husband
