Nagisa grew up as the eldest daughter of a salaryman family. Until she graduated from university and started living alone, she had to take care of her siblings, so she had less free time than her siblings. Furthermore, she didn't have her own room, so she couldn't even masturbate. She would break curfew every night to relieve stress. She married her husband, whom she met while working part-time at a cabaret club, on impulse, but her life was far from ideal, and she was getting more and more stressed, so she naturally started to have less sex with her husband. The network of customers she made at the cabaret club naturally became a list of people she wanted to find sex partners with.