Saiko Yatsuhashi, a married woman with big tits, ends up working at a hostess bar in a bustling city district due to unforeseen circumstances. The manager begins teaching her the basics of the sex industry, but she feels nervous about her first time. Though hesitant about straddling men and being touched, her body instinctively responds to the contact. Seeing her reaction, the manager starts instructing her in more advanced, intimate techniques—eventually introducing her to bareback creampie sex, the ultimate act. On opening night, the place fills up fast, and to meet the customers' demands, Saiko is pushed into full-on sex work.