Tall and possessing a cool, somewhat distant aura, "Juri" comes across as strong-willed and unapproachable. She doesn't flirt with men, instead maintaining a firm attitude that surprisingly appeals to certain customers, earning her steady popularity. One day, a persistent lecherous older man sits at her table, and irritated by his behavior, Juri gets into an argument with him over whether her clit will get hard or not. Pushed by pride, she boldly declares, "Especially for perverted old men like you, I'd never get aroused no matter what you do!" Taking her words as a challenge, he immediately retorts, "Then let's test that," and presses a vibrator against her groin, initiating a game of endurance. Unable to withstand the stimulation, Juri climaxes violently, shooting semen into her panties. With this weakness now exposed, she's forced into increasingly lewd acts—and suddenly, her hidden switch flips on. Again and again, she erupts in powerful orgasms. Yes, in truth, she was an extreme masochist. Once ignited, there's no stopping her. Juri is then put through relentless "M training," forced into countless positions and tormented with various sex toys in an intense, humiliating session.