As a reaction to the stress of work and her shy personality, Aya has developed a perverted sexual habit. On a day off, she is on a promenade alone, indulging in exhibitionist masturbation, when she is seen by a stranger. Seeing her in such an obscenely exposed state makes her legs freeze and her body tremble, but the man's lewd gaze makes her pussy wet and she finally volunteers for humiliation training. Wandering around naked, being tied up in the outdoors and tortured for pleasure, and the man's extreme orders to expose herself stirs up her sense of shame, and she can't help but cry out, "Look at this naughty me more."