Ryo has been working at this company for six years, and before she knew it, she was the Ryo female employee there. Although she loves her job, she is fed up with her lackluster coworkers, subordinates, and superiors. Just then, she starts to feel strange gazes, and when she opens a cardboard box that arrives at the company, she finds a collar and adult toys inside. The next day, she encounters a male employee who has sneaked into the women's restroom, and he begs her to train him. Ryo is confused, but when she steps on the male employee as he wished, the sadism that had been dormant inside Ryo blossoms...