A man who was engaged in sugar dating believed Kasumi Tsuki to be sexually unresponsive, so he drugged her with sleeping pills and restrained her. When Kasumi awoke, she found herself in an unfamiliar place, filled with fear and confusion. Men in white coats appeared, forcibly removing her underwear and inserting an electric probe against her will. Overwhelmed by intense pain and convulsions, her body gradually began craving lewd pleasure on its own. A shocking narrative unfolds through sudden changes and overwhelming sensations.