Futanari girl Mao, hiding her masochistic desires, has her mind consumed by the pleasure of BDSM as she gradually falls into an abyss. Led by an older gentleman she met on the street, she discovers the ecstasy of having her body dominated. Fingers invade her anus, semen is forced into her mouth, and her crotch is constantly stimulated with electricity. Each step drags Mao's consciousness deeper into submission.