After inheriting her late husband's company as president, Hitomi Katase finds herself troubled by opposition within the firm. Orchestrated by the managing director, the leader of the dissenters, Hitomi falls victim to a malicious trap set in the workplace. Bound and restrained in front of her coworkers, her anus is exposed to the gaze of all. One after another, men violate her, driving her into the depths of utter humiliation. A full-scale anal training begins, luring her into a hell of perverse pleasure. As lewd torment takes control of her body, will her abused backdoor withstand the relentless degradation?