He's going to have to provide some "fluids".

“W-well, there’s two main parts; the chemical analysis, and a stress test.” Kuchibashi took out two test tubes and a needle. “For the chemical analysis, I’ll need a little bit of your blood to check for any organ damage. And I’ll, uh… need a sperm sample as well.”

“S-seriously?” Shuichi covered his groin on reflex.

“Look, I know it’s a little awkward, but it’s necessary to make sure your genitals are still working properly,” the pharmacist explained. “You don’t want to risk this making you impotent, do you?”

“No… I guess not,” Shuichi relented. “You, uh, don’t happen to have any porn, do you? I forgot to charge my phone at home.”

“I’m afraid I don’t have anything like that with me. However…” Kuchibashi removed her white coat, revealing her tight grey undershirt. “I’m a sex worker too on the side, so I wouldn’t mind helping to… stimulate you if you need it.”

“R-really?” Shuichi blushed. “Are you sure about that?”

“Don’t worry, it’s no problem at all, and it will help save time.” Kuchibashi began unbuttoning her shirt, revealing the lacy black bra she had underneath, before slipping off her skirt and revealing her matching panties. “Besides… my skills could use a little refreshing.”

Shuichi swallowed but didn’t resist as she got on her knees in front of him and unbuttoned his pants.

“I see you’re becoming hard already,” Kuchibashi observed as her gloved hands gently stroked his shaft. “That’s a good sign, but we can’t assume anything.”

Shuichi nodded and grunted as the silver-haired woman continued her to massage his shaft. Her black gloves were made of vinyl, which made her hands feel unnaturally smooth and gave them a texture unlike anything else he had ever felt on his dick. Slowly, it throbbed and pulsed until it was fully hard and a drop of precum formed at the tip.

“Above average length and a good girth, no signs of sores or damage. That’s good,” Kuchibashi observed, her face so close to Shuichi’s dick that he could feel her breath through her mask. “Now, I’m going to start using my mouth. Please let me know if you get close to finishing so I can collect your semen, okay?”

Shuichi nodded and expected her to finally take her mask off. But, to his surprise, she instead pulled her mask forward a little and allowed his cock to slip between her mask and her mouth. Shuichi let out a gasp as he felt Kuchibashi’s hot, soft lips press against one side of his shaft and the smooth fabric of the mask, still warm and moist from her breath, pressed against the other.

Once she was sure her mask would not come off, she began to gently kiss Shuichi’s cock, pressing her lips gently against his hard pole with soft smacks, working her way slowly from tip to base and then back again. Encouraged by the way his dick kept pulsing and the way he moaned, Kuchibashi began to add her tongue in as well. She was conservative with it at first, only occasionally extending her tongue to lick him at first, but she grew bolder as time went on.

“Ah! Y-you’re… really good at this!” Shuichi grunted as the licks continued. “I had no idea a blowjob could feel so… unique! Aaah!”

“I-it’s no big deal, sir. I’m just trying to make you finish as quickly as possible.” Despite her words, the silver-haired woman was blushing behind her mask and was encouraged to go even further. Her tongue was fully out of her mouth now, and she was lathering Shuichi’s shaft with her spit. Her tongue slurped as it snaked up and down around his cock, making sure that not even the far side remained untouched by the slick appendage. She paid special attention to his cockhead as well, swirling rapidly around the tip while her hands gently kneaded his sack, checking for abnormalities even as she aroused him even more.

“N-no… your experience… really shows…” Shuichi was sitting back on the exam chair now. “I can see… why men would pay a lot for this!”

“They… don’t pay that much,” Kuchibashi said a little bashfully as she focused on the tip again, licking carefully underneath his crown before shoving the tip of her tongue into her urethra. “Is it okay if I start taking you inside my mouth now?”

Shuichi nodded and Kuchibashi removed his cock from behind her mask. This was only for a few moments, though, as she lifted the bottom of her mask this time and allowed his dick to enter her mouth directly. Again, she focused on his tip, her tongue moving around it so quickly that Shuichi could hear her saliva swirl in her mouth. Then she let him in even deeper, careful not to let any of her teeth touch his skin as he was immersed into the warm cavern of her mouth.

“So… good! Ah, ah!” Shuichi writhed a little in his seat and, in instinct, placed his hands on the pharmacist’s hair. She didn’t seem to object, so he kept them there, slowly stroking her locks as her blowjob continued.

Kuchibashi soon transitioned from using only her mouth to taking it into her throat as well, allowing his girth to stretch her gullet as her tongue swirled around the base. Shuichi couldn’t see any of this because of her mask, of course, so it was almost as if his cock was disappearing into another dimension of pure pleasure whenever she thrust her face forward. She kept moving her mouth faster and faster as well, surprising Shuichi that she wasn’t making herself uncomfortable.

In reality, Kuchibashi was feeling some discomfort as she sucked him, but the way Shuichi kept moaning, praising her and stroking her hair made her want to work even harder to please him. She kept pushing herself more and more, thrusting her head as hard as she could while rubbing her clit through her panties with her free hand even as she could start to feel some pain in her throat.

This did not go on for too long, though, as Shuichi soon grunted and warned the pharmacist that he was about to blow. Kuchibashi’s reaction was swift, pulling herself off his cock in one fluid motion and aiming his dick at her readied test tube. He began to unload a moment later, pumping shot after shot of his thick seed into the glass.

“Oh my! There’s… quite a lot of it!” Kuchibashi gasped as the test tube was filled nearly to the brim. “That’s… not a good sign, actually.”

She then quickly cleaned herself off and walked to a table of scientific equipment, placing the test tube into a stand and then using a dripper to collect two samples; one she placed into a strange machine and the other she placed into a slide that she put underneath a microscope.

“Oh dear…” Kuchibashi rapidly turned the wheels of her microscope to observe the slide as thoroughly as she could. “That’s definitely not normal.” A few moments later, the machine she placed the other sperm sample into dinged and printed out a small sheet of paper, which she tore off and read. “Just as I thought… tell me, have you had sex today already?”

“Uh… yeah, a few times. Why do you ask?” Shuichi began to sweat even more than he already was.

“Well… the good news is that you don’t appear to have any testicular or prostate cancers… yet,” Kuchibashi replied, walking back to Shuichi. “However, your sperm count is unusually high, and the amount of seminal fluid you produced is far above average. If that kind of activity persists, it could lead to… complications down the line.”

“Well… at least I’m not impotent, right?” Shuichi joked, though some of the color was gone from his face.

“For now, yes, but I would recommend waiting a few months before taking Kibofil again – though in the state you’re in, it probably won’t be necessary. You should return to normal on your own, but I’d recommend getting checked again in a month to make sure you’re on the right track,” Kuchibashi explained as she brought a needle towards Shuichi. “Now for the blood sample. Please, do your best to hold still, but feel free to look away if you’re squeamish.”

Shuichi nodded and calmly let the woman draw some of his blood into a small vial. Once that was done, she bandaged his arm and put the vial into a nearby machine, which whirred to life as she turned it on.

“Alright, this test should give us the final word on any organ damage you may have suffered.” Kuchibashi reclaimed her seat in front of Shuichi, still wearing only her underwear. “It will take a few minutes to complete, though. I hope you don’t mind.”

“Don’t worry, it’s no problem at all,” Shuichi replied. “So, uh… how long have you worked here at this pharmacy, Ms. Kuchibashi?”

The pharmacist winced a little and turned away. “Five years now. There have been ups and downs, but I think it’s a good job. Plus…” She turned back towards Shuichi. “I l-like to think I help a lot of people here.”

“Don’t worry, I’m sure you are.” Suichi’s eyes wandered around the room for another conversation topic and eventually settled on a college diploma that was framed on the wall. “Seiko Kimura… I saw that name over by the front desk too. Is that name of your boss?”

“A-actually… that’s my name,” the silver-haired woman replied. “I own this pharmacy, so I don’t technically have a boss.”

“Wait… so your name isn’t a secret?” Shuichi gasped.

“No, of course not.” Seiko lifted her mask a little as if trying to hide behind it. “This isn’t a back-alley doctor’s office, after all. I’m required to post my name by law.”

“Well, why do you call yourself Kuchibashi then?” Shuichi asked curiously. “Is it some kind of sex worker tradition to have a pseudonym even if you don’t need one?”

“Actually… I don’t call myself that.” Seiko’s eyes drifted down to the floor. “It’s everyone else who calls me that.”

“Huh?” Shuichi blinked in shock. “But… why on earth would they do that?”

Seiko gripped the front of her seat tightly. “When I was little, I had some… dental abnormalities. The other kids made fun of me a lot, and they thought my teeth looked like a beak – a kuchibashi – so that’s what they called me.” Her grip on her seat loosened in resignation. “I was eventually able to get my teeth corrected with braces, but the name stuck. Everyone just kept calling me Kuchibashi; my friends, my teachers, even my family. Everyone just… assumed that it was just my nickname and that I was okay with it.”

“But… you’re not okay with it, are you?” Shuichi tried to look the woman in the eye, but she deliberately avoided his gaze. “I don’t understand. If the name bothers you that much, why don’t you just ask people to stop calling you that?”

“It’s… not that big of a deal. Trying to make people stop calling me that would be too much of a bother,” Seiko replied, eyes locked on the floor. “Besides, it’s not like anyone who calls me that these days is mocking me. They call me Kuchibashi out of love, and what right do I have to complain about someone doing something out of love?”

“Because they’re still hurting you, aren’t they?” Again, Seiko refused to meet Shuichi’s gaze. “Look, I guess maybe none of this is my business… but I don’t think you should have to put up with that. You seem like a good woman, and you deserve respect; or, at the very least, a nicer nickname. Like, I don’t know…” Seiko finally turned back to look at Shuichi, giving him a look at her soft purple eyes. “… Amethyst.”

“Y-yes, well that’s, uh…” Seiko blushed behind her mask for a few moments before she was saved by her machine beeping. “Oh, it looks like your test results are back. I better go check on those.” Seiko walked over to the blood analyzer and read the paper it printed out. “Alright, this one is all good news, thankfully. All your lab values are within normal limits, and there’s no sign of any organ damage.”

“Really? That’s fantastic!” Shuichi smiled, his whole demeanor lightening instantly. “That means I can leave with a clean bill of health, right?”

“Well… not exactly,” Seiko replied. “There is still a small chance that your heart was damaged in a way I can’t detect, and if that’s the case, then… your heart might stop if you exert yourself too much during sex.”

“What!?” Shuichi felt the color drain from his face again. “So… what, I have to let my partners do all the work from now on?”

“Well, that’s certainly an option… but not the only one. Another option would be to have you undergo a kind of stress test.” Seiko stood up and opened a nearby drawer, revealing a blue electronic wristband inside. “All you’d have to do is wear this and… f-fuck me as hard as you can. That way, I’ll be able to spot any cardiovascular abnormalities you might have, and I’ll be able to intervene if you enter cardiac arrest.”

“Oh my!” It was Shuichi’s turn to blush this time. “And… I have to do this with you?”

“Well, you could theoretically do this with anyone, but I can’t guarantee I’ll be able to save you if you do it with someone else,” she replied. “Though, I’d understand if you didn’t want to have sex with me.”

“No, no; I’d be honored, actually,” Shuichi said hastily. “I just wanted to make sure that you were okay with that.”

“Of course; if it’s to help one of my patients, I would do anything.” Seiko secured the wristband to Shuichi’s wrist and turned on a nearby monitor, which displayed his pulse and blood pressure. “I’ll need to make sure you’re fully and naturally aroused for this, so please give me another moment.”

The pharmacist took a small pink pill from a nearby bottle and slipped it underneath her mask to swallow. A moment later and her whole body seemed to somehow shift – her hair became a little longer and straighter, her hips curvier, her waist thinner and her breasts seemed to swell up an extra cup size.

“Oh dear!” Seiko gasped as her bra suddenly snapped open, freeing her enlarged tits and allowing them to bounce in front of her. “That dose was a little more potent than I thought it would be. A-anyways, feel free to start whenever you want, but please remember; the test won’t be accurate unless you exert yourself as much as possible.

Shuichi nodded and got up from his seat. When he reached Seiko, he began by placing his hands onto her breasts, fingers pressing down into their soft and sensitive flesh to make sure that they were real. Then, he slid his hands gently down her sides, making Seiko shiver with arousal as he brought his hands down to her black panties.

“H-hey! I said you need to exert yourself!” Seiko complained, blushing once again. “This is… way too gentle… aaaah~”

“I know, I’m just… getting a feel for you first.” Shuichi leaned forward and kissed Seiko on the stomach as he slipped his fingers underneath the brim of her underwear, pulling them down and exposing pussy to the room. “Ah! You’re already so wet.”

“I-it’s one of the effects of the **** I just took,” Seiko insisted, her legs shaking as she stepped out of her panties. “N-now could you please start? The sooner we get results, the better.”

“R-right.” Shuichi guided Seiko over to a nearby counter and bent her forward so she could brace herself against it with her hands. He then carefully lined up his cock with her lower lips, allowing her warm arousal to drip down over his tip. “Just be sure to tell me if you need to stop, though. I don’t want to hurt you, after all.”

“Don’t worry; I’m doing this for you, so don’t hold back,” Seiko said over her shoulder. “No matter how I moan, or whine, or scream, don’t slow down.” Seiko tightened her rip on the countertop on reflex.

Shuichi nodded one last time before placing his hands on Seiko’s sides and thrusting forward as hard as he could, burying himself to the hilt in one fluid motion. He grunted at the feeling of her warm folds wrapping around him, though that was drowned out entirely by the way Seiko screamed in ecstasy at the penetration. The office worker remembered what she said about pushing himself, though, so he didn’t hesitate before pulling back and thrusting into her squeezing hole once more.

“Ooooh my!” Seiko’s toes curled as she felt Shuichi’s groin collide roughly with her clit and his thick cock slide against the most sensitive parts inside her pussy. “You… are setting a healthy pace… so far… but you’re still holding back… aren’t you?”

“I’m… just building up my speed,” Shuichi replied, the sound of his hips smacking against hers echoing throughout the examination room. “It’s just… you feel so good, I’d blow right away if I didn’t pace myself!”

“Aaaah!” Seiko let out another loud moan as she felt Shuichi’s cock throb close to her womb. “Th-that’s okay… I’m sure… you’ll last longer than that!”

Reassured, Shuichi reached around Seiko’s body and gripped her breasts once more, using them as leverage to thrust even faster while giving her as much pleasure as he could. She reacted almost instantly, her walls clamping down hard around Shuichi’s shaft as she could feel a heat start to rise within her chest. Her nipples quickly hardened as well, giving Shuichi’s hands something else to play with as he kept squeezing her hypersensitive tits again and again.

Shuichi, meanwhile, did his best to increase his pace, shoving his cock inside Seiko like a jackhammer inside her dripping snatch. It was a little hard for him to remain focused with the way her pussy felt, though, since it was constantly writhing and pulsing around him as if it were trying to squeeze him dry. But he steeled his determination and kept going, watching his heart rate increase on Seiko’s monitor as he put all of his energy into fucking her.

“Th-that’s more like it!” Seiko gasped, her breath so hot and wet that it was condensing on the inside of her face mask. “But… you still need to go… the extra mile! We won’t know you’re safe! Until you do!”

“I’ll… do my best!” Shuichi grunted and did his best to increase his pace even more, his hips becoming a blur as he pushed them to their very limit. For several minutes he continued at this frantic pace, slamming into Seiko and causing her to let out moan after moan of ecstasy as he stretched her pussy again and again.

Then, as he felt himself starting to get close to finishing, Shuichi grabbed Seiko by her hips and lifted her off the ground.

“Sh-Shuichi!? Wh-what are you- ooooh!” The silver-haired woman cut herself off as Shuichi began to bounce her up and down on his shaft. The way Shuichi thrust up towards her combined with gravity to spear her tight pussy onto Shuichi’s cock even harder than before. Not only did this allow Shuichi to feel single every inch of Seiko’s slick walls, but it also made Seiko’s pleasure so intense that her hot juices practically splashed against his groin with every single thrust.

“Oh fuck! This… this is t-too much now! I’m feeling… too good! Aaaaah!” Seiko screamed, her enhanced breasts bouncing heavily in front of her as Shuichi fucked her as hard as he possibly could. “I’m so close… I… I’m going to cum! C-cumming! Aaaah, aaaaaa!”

Raising her voice louder than she had the entire night, Seiko screamed out in orgasm as her velvet hole tightened like a vice around Shuichi’s dick. This wound up sending him over the edge as well, and he found himself firing a load just as big as his last one directly into the pharmacist’s womb. A warmth filled her lower body as she felt herself stuffed with his thick semen, which seemed to extend her already-long orgasm even more. Shuichi held Seiko like that on his shaft for a few moments before he finally ran out of stamina and collapsed, falling backward onto Seiko’s examination chair in the process.

“Aaaaa… that was… that was…” Seiko stared back at Shuichi with a dazed look in her eyes before seemingly snapping back to reality. “Ahem. That was… an adequate test. And, according to my monitor, your cardiovascular system is completely healthy. You should be able to return to your normal life just fine.”

“That’s… great to hear!” Shuichi smiled, catching his breath as his cock slowly deflated inside her. “Thank you so much for doing this, Ms. Kimura. This means a lot to me.”

“… actually, we’re not done quite yet. There’s one more thing I’d like to do,” Seiko replied as the effects of the pink pill she took wore off and her body shifted back to normal. “Now, for this next part, I’ll need you to close your eyes. Promise me you won’t open them no matter what, okay?”

Shuichi looked Seiko in the eye again. “Alright… I promise.”

Shuichi closed his eyes and felt Seiko shuffle around on his lap for a few moments. Then, he felt something press against his mouth; something soft and warm and loving. After a second, he realized that Seiko had taken off her mask and was actually kissing him with her bare lips.

It was not just a brief peck on the lips either; it was a strong kiss full of passion and care, as well as a subtle hunger that drove her to keep going. Soon, her tongue pressed into his mouth and swirled around his tongue, savoring his flavor as it explored his mouth. Then, it pulled back, subtly inviting Shuichi to explore her mouth as well. After a moment’s hesitation, Shuichi did so, carefully pressing inside as his hands gently caressed her sides. As their tongues danced together inside her mouth, he could swear he could taste her raw emotion flow into his body as she hugged her body hard against him. He could also feel his tongue brush against her teeth as well, and he could tell that they were all perfectly straight.

Shuichi wasn’t sure how long the kiss went on for, but when it finally ended the two of them were both out of breath once more. Shuichi remembered his promise, though, and kept his eyes closed even after their mouths parted.

“Alright, you can open your eyes again,” Seiko whispered, her voice barely audible as she resecured her mask. “I’m sorry if I broke professionalism there for a moment, it’s just… been a while since I last kissed anyone.”

“Really? That’s too bad; you’re pretty good at it,” Shuichi replied. “So, does this mean I’m free to go now?”

“Yes… you’re free to head home whenever you like.” Seiko blushed as she slowly pulled herself off Shuichi. “And feel free to come back whenever you like as well, okay? I still have lots of **** besides Kibofil that you can use, after all.”

“Don’t worry, I’ll keep you in mind,” Shuichi replied as they both cleaned themselves up. When they were done, they went to the exit together. “Thank you again, Seiko. I hope we get to see each other again soon.”