New office worker Rei is a young, innocent woman who has just joined a company. However, at this firm, new employees who make mistakes at work are subjected to an extremely cruel punishment: they must offer their own buttocks as penalty. The torturous anal duties carried out with special devices completely strip away their human dignity. Rei is forced to perform sex service on clients, receiving creampie after creampie in all three holes, while bound and tortured anally. She is gang-bukkaked on her ass and subjected to extreme acts such as having "living flowers" inserted into her anus. Finally, while still restrained, she has live cocks stuffed into every orifice, enduring continuous anal creampies. "Please plant fresh cocks into my anus..." she pleads, as the once-innocent office lady is reduced to a human flower vase.