Office lady Ami spends her days indulging in sexy fantasies at work. Stimulated by the office atmosphere, her coworkers' glances, and especially her section chief's inappropriate behavior, she appears with her feline-like rounded buttocks exposed, earning her the nickname "Cat Hip." The boss then outfits her in bondage restraints, subjecting her to verbal domination that steadily heightens her arousal. Her once-pure workplace routine gradually distorts into increasingly erotic scenarios.