Nana is being stalked by a male classmate from her seminar, and when she consults her professor about it, he instead conspires with the stalker to use her for their own desires. She is forcibly restrained and subjected to intense anal torture and training. Electric currents are run through both of her holes, and a powerful electric vibrator is inserted into her anus, forcing her to reach extreme orgasms against her will. As a result, she is gang-raped anally and vaginally, driven into a state of complete domination.