Sexual content:

AU, domination, milking-machine, edging, orgasm denial & bondage

Guinea Pig

Somewhere within the halls of Konoha's hospital, a few levels below ground, there are a series of test chambers hidden away from public eyes. There the medical ninja and scientists would develop new medicines and equipment which could greatly benefit the world. Within one of these rooms, a nervous, yet slightly excited Sakura sat helplessly in one of the many a delivery-like chairs and waited for the tests to begin. Her ankles, waist, neck and arms had been neatly secured to prevent any, and all unnecessary movements.

"I'm still trying to figure out why I'm helping you out with this…" Sakura muttered softly; her cheeks had a bright, red glow to them. "And what's up with all this bondage?"

"You promised you would help me, Sakura." Ino hummed cheerfully. "Just try to relax and this will all be over before you know it."

"You still haven't told me why I have to be tied up for this."

"You would have to ask the ones who are in charge because I really don't have the slightest idea – I'm just following protocol."

"Hmm…" Sakura growled quietly as her overly-happy friend fiddled with the large piece of machinery that sat between her restrained legs.

Not too long ago, the hospital's need for more, inanimate and professional methods of extraction semen had increased dramatically. Exactly why and how these demands appeared had not been explained as of yet, but the people in charge were set on making it happen. Somehow, and for some inexplicable reason, Ino had been assigned to one of the few would be conducting experiments using the new equipment. Or that's at least what she had told Sakura.

Usually, these sorts of tests would be performed on the relevant sex but, due to Sakura's unique bodily traits, a few exceptions had been made. In actuality, however, trials were to be prioritised on individuals with these unique quirks until adequate results had been gathered. Not until then would they move over to men which, to Sakura, didn't make a whole heap of sense either. She wasn't told much about anything, but her cooperation was crucial as she was one of the few which had this unique trait.

"Okay, we are just about done…" Ino muttered before suddenly appearing from behind the strange machine. "Are you ready to get started, Sakura?"

Feeling slightly nervous, Sakura glanced around the room from a brief moment before returning her attention to the cheerful Ino. "Sure, let's get this over with before I die of embarrassment…"

"Oh don't be silly, Sakura; we've seen each other naked plenty of times."

"Sure, but not for any sexually explicit reason..."

"Right then!" Ino completely ignored her friend. "I will position this cylinder above your penis and slowly lower it until it has enveloped you completely. I will then start monitoring your body's vitals and reactions to certain stimuli and make appropriate calibrations until we've found a good match."

"Kinky." Sakura joked nervously.

"Haha!" Ino chuckled. "Good one!"

Without much else said, the machine turned on and a subtle hum could be heard coming from it. A few moments later the bulky arm, which the cylinder was attached, began moving into position over Sakura's groin. It was somewhat frightening seeing such heavy equipment looming over her most tender area and the idea of something going horribly wrong was constantly on her mind. But, just as it was about to descend upon her, it suddenly stopped halfway there.

"Oh, of course, how silly of me. You need to be erect for this to work, Sakura." Ino smirked slyly and winked at her friend. "Would you like some help?"

"No, I can do it myself, just untie my hands."

"I'm Sorry, but I can't do that until the procedure is over; I have some very strict guidelines to follow." Ino could barely hide the mischievous joy she felt, and assertively grabbed Sakura's cock with her right hand. "Just sit there for a moment and enjoy…"

Sakura wasn't prepared for her friend's sudden attack and moaned lewdly as the pleasure began to grow in her member. She tried to hold back, as to not appear like as a complete slut, but it was hard to deny the increasing need for more. It had been some time since she last had an orgasm, mainly due to how busy she was and how little Sasuke was home. It was, honestly, one of the only reason Sakura even joined this project, to get some sexual excitement back into her life and maybe enjoy some kinky ways of relieving herself.

"There you go…" Ino whispered softly. "Feel that fat cock of yours growing in my hand, Sakura… Feel it ache for my attention."

"Fuck, Ino…" Sakura groaned as the blush on her cheeks grew. "Do you have to make it awkward?"

"Awkward? Don't lie to yourself, Sakura. You love this… so just admit it already."

Keeping her lips sealed, Sakura remained silent and refused to give Ino what she wanted, regardless how right she were. Her hand continued to travel along the length of her bulging shaft and it would not take long until she became rock-hard. Unable to keep her welling lust hidden any longer, she let out another groan as her cock strained and jerked. Her inner voice, which usually was the source of her mental strength, screamed and begged for her to let go of her silly pride and just enjoy it; her entire being seemed to falter under the weight of Ino's meticulous and playful teasing.

Staring at the marvellous erection before her, Ino couldn't help but to gasp in awe at its size. "Holy shit, Sakura… I knew you were big, but I had no idea just how fucking massive you truly were."

"Stop staring, please… this is too embarrassing…" Sakura's face was as red as it could be.

Giving her a few more, intimate strokes, Ino licked her lips and, once more, guided the cylinder down onto its pray and slowly watched as the machine consumed the humongous girl-cock. "There we go… watch as it swallows your fat cock…"

"Ooooooh fuuuuck!" Sakura tugged at her bonds instinctively. "It's so tight…"

She had no idea what was inside that metallic sleeve, but it was unreasonably soft and slick. Small tendrils and squishy buds pressed against every part of her veiny member. Sakura could feel several, tight rings pressing down along the length of her shaft, but they did nothing as of yet. Once the machine had enveloped her entirely, she noticed it shrinking around her, and especially around her sensitive cock-head. It was almost as if her cock and tip was being sucked and squeezed by an ever-increasing pressure, to a point where she would be far more susceptible to whatever the machine was about to do.

It was definitely an odd, but incredibly arousing experience having such an alien device around her fat girl-cock. Sakura couldn't find words to explain how it felt, nor would she be able to express them out of fear of sounding like a sex-starved harlot in heat. Her eyes was entirely focused on the plain and boring device, almost as if she hoped to pierce it with her gaze, just to understand what was going on inside it.

Then, just as her curiosity began to boil into an acute need, the machine purred into life. Her heart skipped a beat as the suction inside the cylinder increased drastically, and the walls began to move along the length of her hardened shaft. It sucked so ferociously on her member, forcing it to grow even further. Sakura began to wonder if this was part of its function, to bloat the user's cock by both tightening the sleeve and sucking on it at the same time, forcing it into an erection which she could not get rid of.

Groaning and grunting with delight, Sakura felt the sleeve begin to rotate and vibrate while the many rings began to squeeze down on specific parts of her cock. One crawled down to the base of her shaft and tightened rapidly, while the other two positioned themselves around the middle and just under the ridge of her tip. They didn't not sit as tight as the on at the bottom, but these would gently nudge up and down, just an inch, without any apparent reason. Of course, Sakura could not even attempt to understand what each, individual part was designed to do; she was far too busy with being blown away at the sheer magnitude of pleasure that coursed through her.

"So what do you think, Sakura? Does it feel good?" Ino smirked joyfully – she knew her questions were completely redundant, but hearing her friend answer them gave her such a delightful rise.

"I… I…" Sakura stammered. "I-l love it!"

"Glad to hear it!" she paused, and fiddled momentarily with the controller in her hand. "Let's turn it up to level two."

With a single, lewd gasp, Sakura lost all the air in her lungs as her cock expanded explosively inside the sleeve. The machine sucked, vibrated, stroked and licked against every sensitive spot on her bulging cock and slowly built up speed until it had reached the desired level. Sakura clawed at the edges of the chair and dug her nails into the leather-like cushion, hoping to take the edge off of this intense sensation. A few moments later, she began to pant hard and fast as she felt her testicles contract and pump. "What the hell?!" she thought. "I can't be cumming so soon!"

Noticing how rapidly Sakura's first orgasm approached, Ino quickly turned the machine off. "Woah! Slow down there for a second, Sakura! We can't have you blowing your load so soon and risk ruining valuable data!"

Sakura wasn't listening; she was far too focused on her incoming orgasm to even care about outside interference. However, just as she was about to empty her massive load into the inanimate object around her cock, the machine had already ceased all activity and the three rings around her cock all tightened to prevent any fluids from leaking out. Sakura groaned and gritted her teeth as she thrashed within her bonds, unable to properly deal the harsh edge and the overwhelming frustration she was forced through.

Her testicles felt as if they were boiling and kept pumping desperately and relentlessly for several seconds until they finally gave up. Not a single drop of semen had managed to pass through the rings around her shaft and her orgasm had ultimately, and effortlessly, been denied. Sakura swung her head from left to right in sheer frustration and instinctively humped hard into the metallic sleeve, but didn't not managed much.

"There, there…" Ino whispered as she stroked her friend's head in hopes of calming her down. "Let's try going a bit slower this time."

"Just let me cum, Ino, please…" Sakura begged meekly.

"Not yet, but soon, Sakura – just hold on and let me run a few more tests."

How the hell was she supposed to hold on when just a few minutes of testing had pushed her through one of the strongest edges she had ever experienced? Unfortunately, Sakura didn't have much time to contemplate her situation, or much choice, before the machine turned on once more. This time, however, not all of the previous functions had been activated. The sleeve seemed content with simply stroking away at her shaft and sucking tenderly on her tip. In fact, it was so gentle that she had a hard time feeling any excitement from it at all.

"Alright…" Ino muttered to herself as she watched the screen in front of her. "Seems like we should be able keep you at certain levels without too much difficulty, but I need to keep testing, just to be completely sure of it."

The machine began to hum, just a bit louder as the strength of its stroking and sucking increased by a small degree. Unlike before, Sakura could genuinely feel a subtle rise within her sex, as if constantly, but slowly, being pulled towards an inevitable orgasm. But, just as the pleasure built up, the machine returned to the previous, stale setting, leaving her just a bit frustrated and annoyed.

"Interesting… It seems like I was correct…" Ino tried her best, but during her seemingly, professional act, an evil grin began to emerge. "Let's keep going, shall we?"

Biting down on her lip, Ino quickly removed the devilish grin from her face and kept staring at the screen. On it was all the information she could ever hope to need in order to achieve her true intentions. Not only did it show Sakura's vital, it also showed the level of her excitement, brain activity, stress levels, and how close she was to an orgasm. As a result, Ino had full control over her friend's ability to ejaculate, and that kind of authority was something she could not ignore, and would abuse maliciously.

For the next hour, Ino used every little trick she could to make her friend's experience as intense and frustrating as she possibly could. It was a slow and meticulous torture, and Sakura tried so hard not to break under the unrelenting assault on her sex. In the end, however, the copious amount of strong edges and the continuous denial of her orgasms got the better of her. She tried to summon the unreasonable strength in her body, to tear free from the hellish bonds and finally receive what she was promised. Instead, she found herself completely powerless to do anything; something was holding her back.

"W-What… I…" she stammered, unable to form a coherent sentence. "I-I… can't…"

"I'm sorry, but I can't have you going wild or breaking free from the chair, Sakura. Not until we're done." Ino chuckled briefly as the supposedly energetic woman wriggled around in vain. "You see, the chair you're so comfortably resting in has a chakra-dampener installed. Its purpose is to keep the occupant relaxed and safe; it's just another precaution to prevent self-harm."

"Aaaaahh!" Sakura moaned loudly as her throbbing girl-cock was forced through another edge. "C-Cum!" she begged. "P-Please let me… Cum!"

"Soon enough, Sakura, I promise." Ino untruthfully stated.

As she lied there, tied own, edging and her entire body on fire, Sakura meagrely jerked and hoped to find enough energy to vocalize her thoughts. She couldn't stand this any longer, she had to cum, and she had to do it now! Her testicles were bloated with an abundance of thick, boiling cum; there was not a single moment where she couldn't feel the aching need, that urgent desperation to unload.

"Please, just let me cum already!" she roared. "Milk my fat cock before I got insane!"

Ino felt her own excitement flare as those wonderful words reached her ears; her friend was pleading so nicely and so desperately. "Oh I can't wait any longer… It's time I give you what you deserve…"

With that statement, Ino finished calibrating the machine and watched as it began to work, as it was just told, on the massive cock. She listened to the series of lewd noised produced by her friend as the pleasure soared in her body. Ino walked slowly towards the table near Sakura's head, leaned down and picked up and item. She turned her attention to the flustered woman below her and watched the intoxicating expression on her face.

"Open wide, Sakura…"

Not thinking, or even listening, Sakura felt a round object pushing against her lips and into her mouth; she did not realize what it was until it was far too late. The ballgag was quickly secured around her head and Sakura was no longer able to speak properly, or to object what was about to happen next. She stared up at Ino as confusion filled her mind, and what she saw was an unbelievably sinister and satisfied grin.

"I hope you've been enjoying yourself during the last hour, because what you're about to experience is something truly unique and special…" Ino crouched down and positioned herself at the same height as her friend. "I'm going to be leaving you for now, and I won't be back until much, much later..." She reached out, placing her hand on Sakura's cheek and caressed it gently. "Meanwhile, this machine is going to edge your brains out… It's going to tease and torment you to the outmost of its capacity, over and over again…"

"MMMMPPHH!" Sakura screamed at the top of her lungs as the machine threw her into a state of constant edging. Her eyes were wide open as tears began to form; not from sadness or fear, but from the powerful sensation tearing her mind apart.

Walking towards the exit, Ino purred lewdly as she listened to the screams of her edging friend and felt the juices run down between her legs. As she was about to open the door, she turned around and saw the fantastic view of Sakura and the machine which tortured her enormous girl-cock. She smiled and nibbled softly on her lower lip; she imagined what it must feel like to lie there helplessly, unable to stop that wicked machine for fucking you braindead. Ino could barely wait to get out of there and grab one of her fuck-buddies, just so she could get off on a nice, juicy cock; it didn't matter who, all she would be thinking of is Sakura edging and screaming for hours.

"You know…" Ino chuckled. "If you hadn't snagged Sasuke away from me, then none of this would have happened…"

"Mmmm?!" Sakura groaned, turning her head and staring at the grinning woman."

"Maybe I should pay him a visit?" she winked and quickly left the room and locked the door behind her. "You wouldn't mind that, right?"

With a whirlpool of incoherent thoughts, Sakura began to chew on the ball in her mouth, cursing silently as the machine fucked her senseless. But, even as the functionality of her brain decreased, Sakura managed to piece together enough words to form a sentence which she would repeat over and over again. "I'm going to fucking pummel that arrogant pig into mashed bacon!"

Author's Note:

Hi there! I hope you've enjoyed the story as much as I did writing it! If possible, I recommend you to leave a few words of feedback as it will benefit both me and yourself in the long run. Constructive criticism is something I value quite highly and keep very close to my heart. If you'd like to support me and my writing then that is a wonderful way of showing it. Of course, there are a few other ways of supporting me and those methods can be found on my profile; explore it at your own leisure. With that said, I hope to find you guys in the next story and/or chapter. Keep being awesome!