Aurora Over a Dead World

"...F-Fuck...t-this is hard..." I bite down hard on my lollipop, listening to its sweet crack as my bare breasts are dragged against the floor, hearing the metallic clank of my tail adjusting the weight of my hips along with my spinal prosthesis because my ass is raised up.

"A-Aya, what’s the result?"

"[100% effectiveness of the compressed-air-generated piston, Zenith-Sama]" A.Y.A Nex answers my question. Since I was learning robotics, I decided to create my own "Nexus," one with less personality, greater obedience, and outside the government’s control. I used the Nexus’s old database as a base, so Aya can’t be seen or controlled by the government, and even the Nexus doesn’t know Aya exists.

"Haa...haaa...this is really...haaa...m-much harder than I e-expected..." What I’m testing is a sexual "toy," a machine that makes a piston movement on its own and is thrusting the sex toy deep inside me.

Of course, there are a few reasons for this choice. It’s not merely an automatic sex toy meant to fuck me. It’s a highly calibrated weapon. It’s currently operating at its minimum potential, which generates a powerful piston that thrusts inside me with force.

But at maximum power, it generates a piston with enough force to pierce reinforced vector steel. I’m trying to manufacture weapons that could be useful against Nemesis, meaning weapons without vector technology that use basic principles such as leverage, propulsion, and others to attack, while remaining simple.

"[The sensors indicate good control over the release of air]" Aya gives her little report. Since she has far less personality than Nexus and I’m the only one with access to her, I don’t mind her watching me get fucked by a machine.

"T-The sensors...which ones dropped to orange or lower?" I ask with my arms crossed, trying to keep calm while every thrust from the toy pushes me forward, dragging my breasts across the wooden floor of my new home. I bought an isolated house in a forested area that I got permission to use, so I have privacy.

"[The three sensors in vertebrae 1, 5, and 8 of the spine showed orange-level variation]"

"...H-Hahaha...if you were a normal person, that would have broken your spine..." The thrusts are violent, and this is the minimum strength, showing just how powerful this invention of mine is.

’I can’t believe I’m using something this strong as a toy...I don’t know what’s more absurd, that I’m enjoying this, or that Nadir’s thrusts are stronger than this...what a rough man.’

"Aya, the...Nghhh...s-sensors in my fingers...how did they do?"

"[The calibration of your prosthetics is perfect. I regret to inform you that I cannot communicate with the Cube]"

"That’s what I expected..." I’m not perfect at this. Even though I picked up robotics and programming quickly, I’m only at an intermediate level and rely heavily on research and tutorials.

At least Aya has her own database, so now Aya is helping me improve Aya herself and learn more about robotics and programming.

"[Your arousal level has increased. The small uterine sensor detected the pressure from the impact as medium-high, which implies that for firing shots, stakes, or other projectiles, the base of the weapon is functional]"

"I-I know!" I say, trying not to moan too much, but every thrust I feel makes me lose my mind. I ordered a penis molded to Nadir’s proportions, but there’s something extremely arousing about the machine’s cold, repetitive movement. On top of that, I’ve already been on all fours for four whole hours with my ass raised, taking thrust after thrust, which has left me extremely sensitive.

’If it were Nadir, we’d have breaks...’

"[The current level of physical stress is 32%. Once it reaches 40%, a break will be necessary, or you will begin to injure yourself]"

"Okay, keep m-monitoring, and tell me when it reaches 39%. Also, check how hot the machine’s motor is. If it’s above 45%, we’ll need to shut it down so it doesn’t break." I take a deep breath, listening to my own breathless sighs and the wet sound of the thrusts inside me.

"[Understood]"

’I could get used to this. Nadir and I only had sex when we needed to before. I think I needed some time just for pleasure.’ Nadir isn’t bad. He’s perfect, and I know that if I asked him for sex, he’d accept, but it’s a strange thing to ask for and it makes me embarrassed. Before, we only did it when we needed energy.

"Hmmmm..." I end up cumming, making the floor of my house even wetter. My fluids have already formed a viscous puddle on the floor, and I end up moaning shamefully, unable to bite my lips hard enough to hold it back.

"Damn..." I hate it when I let out those moans. Aya is recording it so I can watch it later, since I’m using this as training. To fight Nemesis, I’ll need to maintain perfect posture, balance, and movement even under physical stress.

And this machine can generate immense physical stress because of its powerful thrusts in such sensitive areas inside me. But watching myself moan fills me with embarrassment, so I try to avoid moaning.

’I still need the recording’s audio. If only I could just disable the sound...’ I take a deep breath and grab another lollipop from beside me.

"[Zenith-sama, this is your 93rd lollipop in only four hours. If you continue using lollipops to deal with stress, the training will become useless because you’ll become dependent on them to feel calm in combat, and you won’t be able to use lollipops in combat]"

"...Damn...I know..." I smack the lollipops, pushing them away while biting down on the one I picked up.

"Haaa..."

"[Zenith-sama, you’re dehydrated. I’m going to shut down the machine so you can drink some water, okay?]"

"...Okay..." I feel the machine gradually reducing the speed of its thrusts until it comes to a complete stop inside me. Soon after, a drone delivers a tray with a bottle of water.

To avoid interrupting the training rhythm, I don’t even get out of position. I just grab the bottle and quickly drink all of it.

"Bring me a towel too. I’m way too sweaty...this is strangely exhausting." Four hours of sex with this machine have been more exhausting than over 16 hours of intense training. It’s bizarre how much sex can drain the body’s energy.

"[I’ll bring the towel shortly...another five minutes of rest, or should we start again now?]"

"..." I look behind me. This thing is buried deep inside my vagina. Even if it’s only a five-minute break, it’s still inside me.

"...Let’s start again now. I don’t want to waste time, and everything will only last another hour at most...oh, right, and prepare the ointment..." This is already the fifth day of testing. Naturally, my pussy gets irritated from the constant friction and impact, but I found an excellent recipe for an ointment mixed with vector cream that I’m using, and it’s wonderful. It has no side effects.

"[Zenith-sama, my data shows that your arousal, pleasure, posture, and neurochemical responses became 3% more ’inclined’ toward pleasure while your vagina showed a considerable increase in sensitivity]"

Okay, maybe there are some side effects from the ointment, such as increased sensitivity. Combined with constantly fucking myself with this toy, my body ends up becoming more sensitive and giving me more pleasure.

"That’s fine. The machine is almost calibrated, and I won’t use it for sex during the next tests after I finish calibrating it." This is the control test. What better test could there be than fucking a fragile pussy made of flesh? There’s no way the machine could be more delicate than when it’s fucking a girl’s private parts with a toy.

It shows how well its mechanism can be controlled so it doesn’t actually hurt or injure me.

"What are the variations that...nyggggh..." The thrust the machine gives me hits my cervix, making me bite my lips.

"[The machine’s piston variations are between 0.01% and 0.3%, which implies a low force-control margin of error that is perfectly natural. After all, no machine is perfect, and the machine’s only purpose will be to fire something using air-compression force and a directed air explosion]"

"Perfect...keep collecting data. As soon as I’m done here, I’ll try to make it gentler and reduce the force. Then we’ll build a weapon to test on wooden targets..."

"[Understood]"

"[By the way, Zenith-sama, the new routine system we built is finally integrated into me. Now I’ll be able to help you have a healthier routine]"

"W-What the hell are you talking about, Aya?! I’m healthy!"

"[Pizza, instant noodles, hamburgers, processed food, military rations, and more than 80% of everything you eat coming from a can do not constitute a healthy meal]"

"[Also, please don’t use the ’I’m not fat’ card. You’re not going to get fat. You exercise, you train, you put in a lot of effort, and you have vector powers that help you even when you don’t use them. So no, you’re not healthy, even if you haven’t gained weight or your physique looks perfect]"

"[Your blood sugar is high, you eat far too much junk food, you overdo things with sodium, and honestly, I think you would have already had a heart attack if you didn’t have powers, considering how you eat]"

"[That’s why, starting tomorrow, you’d better learn how to actually cook and buy real ingredients, even if they’re a little more expensive. Putting frozen food in a microwave isn’t cooking. It’s slowly poisoning yourself and calling it food]"

"...Damn...already trying to lose your new chip a-"

"Aahhh..." The machine gives me a thrust much harder than the others, pushing me against the wood with a little pain.

"Hey!!"

"[According to my directives, I am authorized to attempt to punish you in order to guide you toward a healthier life]"

"Bitch."