Hitomi Takeuchi is a serious bank employee working at a major bank. She hasn't had sex with anyone other than her husband for over 13 years. She is dissatisfied with the current situation where she only has sex with her husband to conceive, and applied for the job, saying, "I don't want to end my life as a woman before I become a mother." She is burned with a sense of immorality by her first extramarital affair, and shows us a feminine side that is unimaginable from her daytime appearance.