In the Showa era, before televisions, PCs, and mobile phones became commonplace, there was a woman named Kunimi Nana working as an office lady at a company. Women at the time held low positions in the workplace, limited to menial tasks like making tea and running errands. Nana's life takes a dark turn when her superiors discover that her family has accumulated massive debt. In exchange for covering the debt, her boss begins making sexual demands. Initially reluctant, Nana gradually starts experiencing pleasure when confronted with her boss's powerful, throbbing cock. Using her large, voluptuous breasts to milk his swollen shaft, she eventually has a thick stream of hot cum shot straight into her mouth. Gagging slightly at the unfamiliar sweetness of his seed, she forces herself to swallow every drop. But the entire scene is witnessed by the company president. Tempted by an outrageous offer, Nana is soon taken by the president himself. His tongue and fingers roam every inch of her body, awakening sensations she's never felt. Her breasts grow sensitive, her panties are torn off, revealing her salmon-pink pussy. Overwhelmed by a mix of shame and pleasure, her pussy gushes with slick arousal. After endless, maddening foreplay, Nana transforms completely into a submissive slut, craving cock and moaning loudly as she orgasms repeatedly. With each thrust of the president's hips, her body convulses, his thick shaft plunging deep into her wet cunt. Finally, he erupts inside her, flooding her womb with hot cum. A milky mix of semen, pussy juice, and saliva drips from her gaping slit. Body and soul, Nana becomes the president's property.