After six years at the company, Ryo has become its only female employee and is sick of her uninspiring coworkers, subordinates, and bosses. Strange stares begin following her, and a package delivered to the office contains a collar and sex toys. The next day she catches a male employee hiding in the women's restroom, where he begs her to discipline him. Though hesitant, she steps on him as requested—and awakens the dominant sadist hidden inside her.