Takako Fujimori, 28 years old, is a dedicated teacher who deeply cares for her students. One day, she learns that her student Murakami is working part-time at a notorious nighttime establishment, prompting her to visit the place. However, the bar—posing as a members-only venue—secretly engages in the vile practice of training women and parading them in front of customers. Unaware of the truth, Takako enters the bar and is offered drinks by the owner, Daigo, causing her consciousness to blur. Seizing the moment, they subject her to anal training.