In a used underwear shop in Tokyo, customers can get instant high cash payments. This notorious store exploits women's vulnerabilities, using aggressive tactics like making them masturbate to increase the value of their items—and ultimately even producing sex videos. A first-time seller enters, persuaded to sell the underwear she's wearing. She's asked to show it on the spot, hesitating at first, but convinced with the line, "For first-timers, trust is important," she lifts her skirt as her panties are inspected. Since they're clean with little wear, the staff suggest adding stains and scent to increase their worth. Though reluctant, she agrees to masturbate. Her pussy muscles are rubbed vigorously while her nipples are stimulated, her groin twitching in response. In a private office, the woman boldly convulses her lower body and climaxes. With no visible stains, she's made to masturbate again with a vibrator to enhance the scent, her bra pulled aside as her nipples are pinched, making her climax intensely once more. Still not wet enough, the vibrator is taken and pressed directly against her bare pussy, causing her to cry out "No!" in defeat. Her used panties are rubbed against her climaxing pussy to soak up stains. Then enticed with, "How about I use this to draw out the juices and scent inside?" an electric dildo is inserted, grinding against her vaginal walls until she ends up urinating. The vibrator is placed on her clit, turned to maximum power, stimulating deep inside her pussy as she thrusts her hips upward and climaxes again. Her panties are thoroughly soaked with bodily fluids, earning approval: "Sniff sniff... this is perfect!" A Polaroid is taken of her in her underwear, finalizing the purchase. The store manager then proposes, "Wanna shoot a sex video?" offering five times the price of the underwear. He calls in an assistant who gropes her breasts from behind, twisting her nipples roughly. The woman, who's never had sex in front of others, is lifted up, deeply kissed with tongue, then laid back on the sofa and relentlessly fingered while her clit is rubbed. Once again she screams "No!" as she gushes fluid uncontrollably. Her bare cock is jerked off by hand, then she performs a hands-free blowjob. Her head is pushed down from above, her mouth slamming against the cock, grinding her lips and throat, taking it deep as she's aggressively pleasured. At the words, "Well then, shall I enter?" she's laid back on the sofa and penetrated fully in missionary position. Squelching sounds fill the air as deep thrusts piston into her pleasurable pussy. Her twitching, responsive body is lifted up, then pounded hard from behind in doggy style. Sitting on the sofa, she's taken in rear entry, her slender waist gripped tightly as she's violently thrust into from below, her hips convulsing and climaxing again. She's fucked hard in both standing and missionary positions, her inner depths relentlessly pounded. "Ah, I'm cumming!" she cries out, as creampie ejaculation floods her slutty pussy, her body trembling intensely with sensation. "Great, perfect! Will you do another video?" the manager asks, to which the woman quietly replies, "Yes..."—and the production of a new sex video begins.