Two years ago, Usagi, an office lady working in the Second Disposal Division, commonly known as "Shiyorini," at R Co., a lingerie manufacturing and wholesale company, was relentlessly stalked by Kawabuchi, a vicious sales employee from the same company. Kawabuchi had also been illegally selling company products to rival firms, causing significant financial damage. Unable to tolerate such misconduct, Usagi carried out an extremely unusual mission: to strip Kawabuchi of his human dignity and render him a completely useless male employee, effectively destroying him as a person. As a result of her success, Usagi was specially appointed by the president to transfer to a struggling group company. There, she would serve as executive secretary alongside Kawabuchi, who had since become a puppet president known for treating women as complete animal slaves. Shortly after her arrival, Iida, an OL from the sales department, desperately confided in Usagi, revealing that she had been forced into sexual acts by her department head, Omori, and was continuing to suffer from his despicable stalking behavior. Taking immediate action, Usagi enlisted the help of Iida's coworker, Houjou, and all the female office workers in the sales department to thoroughly punish Omori, the sexual harassment manager, degrading him from a perverted employee into a subhuman toilet slave. Meanwhile, Arata, a sales employee and Omori's direct subordinate who had secretly witnessed the incident, attempted to rescue his superior—Omori, who had been secretly subjected to oral sex by an OL in the women's restroom—by exploiting the women's momentary lapse in vigilance...