Located in a certain part of Tokyo is a secondhand underwear shop specializing in high-cash instant purchases. Women in need of money come here to sell their worn underwear and uniforms. Many of these items vary in value depending on stains, odor, and number of days worn. Of course, a Polaroid as proof of wear is a mandatory requirement. Among them appears a slender, demure office lady. As the store manager sniffs the panties she pulled from her bag, she awkwardly says, "I already washed them, so I guess they're unsellable." But the manager suggests she soil the panties by masturbating and selling them instead. "It's fine if you don't want to—I won't force you." To this, she replies, "I do want some extra cash, so I'll do it." With a lustful expression, she starts touching her pussy, quickly leaving a wet stain on the panties. "Fast and good—put more on," says the manager, handing her a pink vibrator. Watching her slender hips twitch as she orgasms with a clean face, he's satisfied. He makes her get on all fours and stimulates her pussy from behind with the vibrator. "Nnngh, nooo…" He spreads her into a wide M-shaped split, pulls her panties aside to expose her shaved pussy, and applies the vibrator directly. Overwhelmed by the sensation, she cries out, "Ah—... I'm cumming!" Afterward, he inserts his fingers deep into her pussy, smearing her sticky, stringy juices all over the panties—finalizing the purchase. The manager asks, "How often do you masturbate in a week?" She replies, "...About twice." Then he proposes, "You're such a horny girl—how about appearing in an exclusive member video? I'll pay you ×× in cash right away." Confused, she asks, "Huh? What would I have to do?" "Sex! I won't push you if you're not into it..." he replies, tempting her. After some hesitation, she agrees. He calls in an assistant and begins filming. With her still wearing the soiled panties, he spreads her legs and inserts his fingers, fingering her roughly. "So wet—listen to that squelching sound." "Aaaah, no, I'm cumming, cumming!" The horny girl writhes her hips and cums hard. Taking advantage of the freshness, he removes the panties and seals them in a bag. Next, he attacks her breasts from behind while fingering her again, her nipples and clit rock-hard. "Aaah, so good..." When he goes down on her, licking her pussy, she thrusts her hips forward and cums again. As he makes her suck his nipples, she reaches for his hard cock. "It's getting so big..." On all fours, he makes her suck his cock, and she licks it obscenely. "Can you take it all the way in?" Drooling, she takes it deep to the base. "Mmm, mmm, jupa, jupa..." The horny girl even looks into the camera while licking his balls. "You love giving blowjobs, don't you?" "Yes... chupa, chupa..." she replies. "Then go ahead—put it in yourself." Sitting on the sofa, he has her mount him from behind in reverse cowgirl. "Nngh, so good..." The insatiable girl won't stop moving her hips, standing up and slamming back hard, making wet, slapping sounds. "Cuming from your cock, cumming—ahhh!" Her pussy quivers uncontrollably. Switching to face-to-face, she rides him eagerly, grinding her hips on her own. He sucks her erect nipples, grabs her ass, and drives his cock deep into her pussy. The slutty girl moans passionately, exchanging filthy tongue kisses as she cums hard from the intense thrusting. Finally, they switch to missionary position for fierce, deep thrusting. "Ah, ah, ah, nooo!" He pulls out and cums all over her convulsing, slender body in a massive facial and bukkake. "You're so damn sexy, Maki-chan—perfect!" The manager leaves the cleanup and payment to his assistant and walks away.