In Tokyo, there's a secondhand underwear shop specializing in high-cash purchases. Unlike regular stores, this shop offers a unique service: customers must provide photo proof of wear, and if they agree, they can also shoot sex videos. The store regularly sees female customers who appear modest and reserved, seeking high payouts. One day, a long-haired black-haired woman arrives with clean-looking underwear that shows no signs of use. "Hmm, I can smell fabric softener. We can't buy unworn items," she's told. Understanding that she must wear them for several days, she decides to sell the underwear she's currently wearing. Right there, she agrees to wear the panties and take a photo as proof. The woman starts rubbing her pussy through her panties, her breathing growing heavier. She's handed a vibrator and begins masturbating over the fabric, twitching with each pulse. When asked, "Did you come?" she replies, "Yes..." Her skirt is lifted, and her arousal is checked manually. "This level of wetness could get you around ○○ with a photo," they say, and the purchase is immediately finalized.
Since she enjoys masturbating in front of others, negotiating a video shoot goes smoothly. Staff are called in, and filming begins. "Let's have some fun, shall we?" says a crew member. The woman refuses tongue kissing, but the staff forces his lips onto hers, strips off her blouse, and starts teasing her hard, erect nipples. "Mmm... haaan..." she moans as her pale, beautiful breasts are sucked on relentlessly, surrendering completely to their touch. Her clit is pinched while her soaked pussy lips are rubbed vigorously. "Aaaah! I'm cumming!" she screams, squirting fluid uncontrollably. Despite her innocent appearance, her pussy is extremely sensitive—when given oral, she shrieks, "Nooo!" arching her back like a shrimp as she orgasms repeatedly. She thrusts her pale, round ass outward, receiving fingering and anal licking. When a cock is presented for blowjob, she hesitates but then grips it, placing the tip into her mouth. "Mmm... mmm..." she moans, taking it deep into her throat. The staff, gripping her head, thrusts roughly into her mouth, slamming his hips into her face. "Gupaa~!" she gags as a condom is rolled on, the cock rubbed against her slit before being fully inserted in missionary. "Aaaaah!" she screams, legs wrapped around as he pounds into her slick, tight pussy, tongue-kissing her while thrusting wildly. "Haaa! I'm cumming!" she cries, pushing her hips back as she's taken from behind standing, thrusting hard and fast. "Aah, so good! Feels amazing!" she yells, remaining penetrated as they sit on the sofa, reverse cowgirl grinding down, then made to lick the creampie-covered cock dripping with her juices.
Though the staff treats the amateur harshly, this rough dynamic strangely works. They turn her around for face-to-face sex with full-body embrace and deep tongue kisses, then flip her onto her back for cowgirl, thrusting up from below, finally finishing in missionary with intense hip movements and a creampie climax onto her trembling abdomen. "How was it?" they ask. "Haa... haa... that was amazing," she replies, concluding the shoot—a pristine, tsundere older sister's raw, uninhibited sex performance.