A secondhand underwear shop in central Tokyo specializing in high-paying immediate cash purchases. Desperate women come here to sell their worn underwear and uniforms. Many fair-skinned, attractive girls visit, including a young woman holding pink lingerie. She claims she's only worn it for a day, but since there's no sign of use, the buyer points out it won't fetch a price. Still, she insists on 5,000 yen. The buyer counters, "If I pay 5,000, I'll have to sell it for 10,000." They agree to take Polaroid photos: she sits cross-legged on the sofa, her legs stretching out from her skirt, white panties on display. Next, she's told to stick out her ass for a rear shot. Her pale, slender legs stand out—on the third photo, she spreads into a wide M-shape, revealing sheer lace panties. A slight stain is noticed, raising the possibility of a higher price. To confirm, the buyer licks his finger, touches her pussy, and sniffs. After checking the stain, he agrees to her 5,000 yen request, hands her a vibrator, and suggests she create a fresh stain right there. Reluctant at first, she's soon drawn into the buyer's rhythm, masturbating with her legs spread, enduring until she climaxes. He waits for her to cum, checks the scent, inserts the vibrator into her panties, and instructs her to masturbate in lewd poses. He pulls down her bra, stimulates her bare nipples, and gives her masturbation support until she convulses in orgasm. As a hidden option, he offers 50,000 yen just to watch her in erotic scenes. While vibrating her pussy, he makes her finger herself, and she cums again. Then he jerks his cock while she gives him a handjob, stimulates her clit, and pleasures him with a blowjob. He forcefully kisses her, sucks her nipples, and she twitches with pleasure. He pulls her panties aside, goes down on her pussy, and makes her cum with cunnilingus and fingering. Fingering doesn't stop—he pulls her pussy close, thrusts deep to the hilt, and takes a Polaroid. He binds her legs, rolls her like a daruma doll, grinds deep inside her, then thrusts harder. Turning her around, he enters from behind, and she cries, "No, no!" Since she's weak in this position, he grabs her arms and pounds her pussy with deep, forceful strokes. Finally, he flips her face down, spanks her ass, and licks her anus. She protests, "Don't lick that weird place!" but he keeps thrusting, pressing his seed into her buttocks. Riding her doggy-style, he makes her rock her hips, then lifts her thin body, thrusting up from below. In missionary position, he slides his huge cock into her slippery pussy, grinding his hips while kissing her. He cums on her stomach, and thus, the girl's soiled panties are sold at a high price.