To pay off her debts from visiting host clubs, a college girl named Ran visits a consumer finance company to borrow more money. However, since she hasn't even paid back her previous loans and tells the man she still can't pay, he presses her, saying, "The only way is for you to film a doujin video and pay me back with your body." Having made up her mind, Ran offers her body and becomes completely obedient to the man. Forced to say lewd phrases like "Ran is a slut who loves sex," "Please look at me spreading my asshole," and "I love smelly cum," Ran gradually reveals her true masochistic nature. Furthermore, the man tells her to earn money not just through videos but also through sex work, introduces her to a brothel owner, and gives her dirty talk training. She is taught various plays to please men. Toy torture, dirty talk sex training, and more follow as Ran is brainwashed and trained with lewd language. "If this video doesn't sell, maybe I'll have you film an anal video next time." Once she sinks, it's the end—the fate of a woman who will be devoured to the very marrow.