Sci-Twi’s Mystery Machine of Randomness

by The Sleepless Beholder

Rating: mature
Tags: Porn, Fetish, Comedy, Equestria Girls, Sex, Main 7 (EqG), Random, Twilight Sparkle (EqG)
Length: 4085

After having a weirdly elaborate and detailed dream about some sort of machine with an unknown purpose, Sci-Twi decides to build it form memory alone without having any idea how it exactly works. Now she only needs some test dummies, but that’s what

Sci-Twi had a dream, of a machine that would do… something.

Ok, she doesn’t know exactly the purpose of the thing, but she knows how to build it thanks to the dream.

Although, she also doesn’t know exactly how it works, but she knows it’s possible to make… somehow.

Ok, this sounds like a really bad idea, but when has that stopped her?

Now if only she had someone to test it on… oh right, she has friends!

Friends volunteer for random experiments, right? Especially if they end up with something sexy.

Warning: Completely random types of content and fetish, no two chapters are alike, read at your own risk.

If you want to know before reading, heres a list that will be updated with every sexy chapter:

Invisible sexy shenanigans

My fifth entry for Dirty little secret´s little dirty contest

Art stolen from Sketch-Bro

Published 2020-05-03 06:20:01 UTC
Last updated 2020-05-03 06:20:01 UTC

The MMR

“You made a what?” Asked Sunset, trying not to gather more attention than the clearly sleep-deprived zombie Sci-Twi that suddenly appeared in the middle of the cafeteria.

“An MMR,” Sci-Twi responded with stars in her eyes.

“What’s an MMR, darling?” asked Rarity, who was trying to give some decency to the crazy-scientist’s hair.

“I have no idea.”

“How does it work?”

“No idea.”

“So, you made a something that you don’t know how it works, or what it is?” Applejack looked as confused as the rest of her friends.

“I saw it in a dream, a very detailed one, and build it before I could forget anything.”

“And where did you build this thing?” Asked Rainbow, giving the girl some coffee, which she drank instantly.

“Let me show you.” Sci-Twi responded before running off, and the girls had to follow her.

They quickly arrived at one of the classrooms, and once they stepped inside, they saw some sort of weird platform a meter wide with two tall arcs as tall as a person that intersected above the center of the platform. The strange machinery had also been wired to a laptop siting in a desk.

“I present you; the MMR!” Exclaimed Sci-Twi, extending her arms in victory.

“Which stands for…?” Asked Sunset, a little freaked out by the girl’s behavior.

“No idea.”

“Okay, is there something you know about this thing that you constructed?”

“That I need a volunteer to test it!” She responded with a smile.

“Test it how?”

“You step inside the machine, I activate it, and… “

“You have no idea, don’t you?” Sunset asked with a deadpan expression.

“That just makes it more exiting!”

“Don’t you mean dangerous? Do you remember the last time you delved into something you didn’t understand?”

“But that was magic, this is science!”

“Mad science you mean.” Rainbow clarified.

“Come on, you’re not scared about some little testing, do you?”

“Of course not!”

“The why don’t you be the first to experience this exciting new adventure into the unknown?”

“You know what? I’m in, turn that thing on.” Rainbow walked towards the machine, and all the girls minus Pinkie and Sci-Twi facepalmed.

“Rainbow, for all we know, this thing will send you to another dimension or something.” Exclaimed Sunset.

“It does have a portaly kind of feel,” Pinkie admitted.

“Okay, how about this, I will only put my hand inside.”

Sunset gave an exasperated sigh.

“Fine, I just hope this thing won’t blow up in your face. Literally.”

Rainbow positioned her hand at the center of the platform, and the rest of the girls watched as Sci-Twi, still deranged-looking, pressed some buttons in the laptop.

“Test of the MMR number one, begins.”

The machine sprang to life with an earie white glow, and a little ray of light fell on Rainbow’s hand before it abruptly stopped, making a ‘ding’ sound, like a microwave.

“I don’t think it worked,” said Rainbow, looking at her hand, but was startled as all her friends started screaming. “What?! I have something in my face?!” She asked panicking.

“Your hand is gone!” Exclaimed Rarity, looking like she was about to faint.

“No, it’s not.”

“What?”

“it’s right here.” She showed her hand to the group, moving her fingers to prove it.

Sci-Twi walked towards her and meekly grabbed her hand like if it would spontaneously combust at any moment.

“She’s right, I can feel it.”

“So, her hand is invisible?” Asked Applejack, as confused as the rest but calmer.

“You made me invisible?! That awesome! Hit me again.” Rainbow quickly stood completely inside the machine with a face full of glee.

“I should do some testing first.”

“One invisible Dashie coming right up.” Exclaimed pinkie, hitting the button and showering Rainbow in light once again.

*DING*

When the light faded, Rainbow was no longer visible.

“Okay, I guess your machine worked after all.” Sunset admitted, still a little freaked out.

“I don’t think so.”

“What?”

“I don’t know, I feel like the MMR wasn’t working at full capacity.”

“You mean this thing could do more than turn someone invisible?”

“Maybe. I need to check it and see if I can do some modifications. Meanwhile, we should turn Rainbow back to visible.” As she said this, the door to the classroom opened and closed by itself. “Did she really just ditch the entire experiment?!” Sci-Twi screamed.

“To be honest, if I was invisible, I would probably try and use it too.” Pinkie Admitted.

“Doing what exactly?”

“Probably some pranks.” She responded matter-of-factly.

“Let’s look for her before she hurts herself and/or others.” Said Applejack, exiting the classroom along with Pinkie, Fluttershy and Rarity.
Sunset remained in place, and then looked at Sci-Twi with a stern look.

“We need to talk.” Sci-Twi smiled nervously. “What kind of Equestrian magic did you use to make this thing?”

“None, I swear. It’s just the magic of science.”

“Science doesn’t make people invisible!”

“Well… I may have scribed some ancient looking runes in some of the electronics.”

“Twilight! Honestly, what the fuck were you thinking?!”

“I wasn’t! I just wanted to construct it before I forgot how.”

“This thing could be dangerous!”

“But it’s not. It didn’t kill Rainbow, and you have to admit that turning invisible is awesome.”

“I won’t deny the last, but it could have easily been the first!”

“Look, just trust me in this one, I know this thing will give us some awesome results, I just need some tests and if I see anything that doesn’t work or is too dangerous I will scrap it and leave it be.”

“Twilight, you can’t- “

“Please Sunset, this thing will drive me crazy otherwise!” She begged, holding her friend by the arms.

“Fine! But get some sleep first.”

“Deal!” Sci-Twi put a mantel over the machine and exited the room with a jump in her step.

“I will regret this, I’m sure of it.”

Hidden in Plain Sight

Rainbow dashed through the halls of CHS with a wide grin on her face.

“This is so cool, I never thought I would be able to become invisible. And I know what I want to do first.”

She stopped in front of the door leading to the men’s showers, a big smile on her face.
Rainbow entered the men’s changing room, and then stood in a corner, waiting patiently.
The soccer practice had ended just a few minutes ago, and she could see the steam of the hot water coming from the showers.
In just a couple minutes, the entire soccer team got out of the showers.
She admired the muscled, wet bodies of her classmates, and as they slowly undressed to their underwear, Rainbow started to rub herself over her sport shorts, panting a little at the sight.
She normally wasn’t such a pervert, but the opportunity for this made her forget some of her inhibitions.
Suddenly, her eyes focused on a particularly large bulge in one of the boy’s underwear and smiled as she saw Soarin filling said underwear.
She had heard rumors of his apparent interest in her and knowing that a good piece of dick desired her filled her with pride.

Sadly, her little show ended quickly as the boys got dressed and started to leave the changing room, but to her surprise, Soarin stayed.
He was looking at something inside his locker, so she got closer to him so she could see.
Soarin pulled out a photo from his locker, looking at it with lust.
Rainbow got close enough to see that it was a picture of her getting out of the shower, a towel barely covering the front of her hips, her breast on full display, and the curve of her ass teasing what was behind. She recognized it as a picture that Sunset had taken of her during her time as a bully, with the intention of selling it to the male students. She though that she had managed to destroy all the copies, but apparently Soarin managed to hold onto the last one.
The fact that he apparently didn’t make more copies made her forgive him, but more importantly; this confirmed the rumors!

“Oh Dash.”

Rainbow panic a little, thinking that she got caught, but Soarin hadn’t noticed her. Instead, he took off his underwear and started to stroke his dick while looking at her picture.
Rainbow looked as his member slowly grew and hardened, reaching an impressive size.
She was impressed, but what was making her more wet was the fact that it was growing because of her. She always loved that people appreciated her awesomeness, but this was a completely different type of ‘appreciation’.
Rainbow looked in trance as Soarin stroked himself at her image, feeling the heat between her legs increasing. She started to caress her pussy directly, even digging a finger in, but it wasn’t enough. She needed that dick inside her.

‘Damn, I can’t just tell him to fuck me while invisible, he will freak out thinking I’m a ghost’

Suddenly, Rainbow had an idea, and quickly started undressing herself.

Soarin looked at the curves of the Rainbow in the photo, wishing he could feel them for real.
He had thought about asking her out someday, but rumor said she had the hots for Spitfire, and after the whole fiasco that gave him the picture to begin with, he was sure Rainbow didn’t look for men in the faculty.
Suddenly, his vision was obstructed by what he guessed was a towel.
The first thought that crossed his mind was that one of his classmates decided to pull a prank on him, but the seductive voice in his ear made him both cold with fear and hot with arousal.

“Looks like I have a very dedicated fan.”

“R-Rainbow?” Soarin tried to hide the picture, but she took it from his hand.

“Even taken by surprise I manage to look awesomely sexy.”

Soarin felt his heart skip a beat as Rainbow leaned on him, and he could feel her bare skin against his, her hard nipples poking him from behind.

“But tell me, wouldn’t be better to feel instead of seeing?”

Soarin could feel her hands in his chest, moving lower while caressing every curve of his muscles, until they got extremely close to his hard member.
The anticipation for her touch in that area maintained him hard, not like he wouldn’t be hard with Rainbow seducing him while pressed naked against him.

“Tell me, what part of me is your favorite?” Rainbow asked, rubbing her chest along the upper part of Soarin’s back, making answering her more difficult.

“You- Your ass.”

“Really? Why’s that exactly?”

“It’s well toned, just the right size, and-” Soarin stopped as Rainbow guided his hands to her ass, planting his palms against her glutes.

“And? Keep going.”

“It’s smooth, and soft enough to dig your fingers a little,” he responded as he gave it a squeeze before moving his hands over it, savoring the feeling of what he considered the best ass in the school.
Rainbow gave a little laugh. “Well, I’m still deciding, but I have a big contender for my favorite part of your body,” she said while dragging a finger over his length, making him sigh with arousal.
Soarin felt Rainbow tightening the towel in his head, making sure he couldn’t see.

“You have seen enough; I want you to just feel,” whispered Rainbow in his ear, turning him around and leaning on him.

He could feel their chests pushing against each other, but the most notable sensation was that of his dick being trapped between Rainbow’s legs. He could feel the wetness of her pussy dripping over his member, arousing him to no end.
Rainbow started moving her hips slowly, covering his dick with her wetness, making him nice and lubricated.

“Do you believe this is a dream?” asked Rainbow.

“If it is, I don’t want to wake up.”

Rainbow grabbed him by the ass, giving a good squeeze, and sat him in a bench in the center of the locker room.
Rainbow stood over his legs and guided the tip of his dick towards her pussy, giving little circling motions to tease him with the entrance inside of her.
Soarin grabbed her by the hips, wanting so bad to just force himself inside, but didn’t want to ruin the moment, so his hands started exploring her body.
The fact that he couldn’t see it made the action more engaging, he was building the image of Rainbow in his head with every touch of her skin and feel of her curves, and it was much better than her picture.
It didn’t take too long for him to find her chest and started massaging it with his hands.
Rainbow let out a low moan, and slowly lowered herself onto him, feeling his dick slowly filling her insides.
Soarin let out his own moan, louder than Dash’s, and continued the exploration of Rainbow’s body.

“Oh yeah, your dick is great,” said Rainbow once his dick was fully inside her. She started to do slow, circling motions like before, but then she took him by the shoulders and lifted herself up, only to go back down again.
She quickened the pace of her movements, starting to pant at the pleasure of being filled by Soarin’s dick.
Soarin himself was being lost in the pleasure, his hands stopping their wandering to just hold Rainbow by the sides, helping her ride him to his pleasure.
The rainbow haired girl leaned over towards Soarin and whispered in his ear again.

“Is this the most awesome ride you ever had?”

“Probably the best I will ever had.”

“Good, because I plan to make it memorable.”

Suddenly, the door to the locker room opened.
Soarin took off the towel in his head to see who had entered but his attention got redirected to the fact that Rainbow Dash wasn’t in front of him, but he could still feel himself inside her.

“Soarin!” called out a voice that again diverted his attention.

Both him and Rainbow looked to the side, seeing a wet, towel-clad Spitfire watching them with a kind-of annoyed look in her eyes.

“What are you doing here?” asked Soarin while Rainbow concentrated on being completely silent.

“Your friends told me you were staying here to masturbate, and I see they weren’t wrong.”

‘Wait, she can see his dick? Am I completely transparent?’ Rainbow wondered while Soarin tried to calm himself and give a response.

“Hehe, you got me.”

Rainbow tried to lift herself off him, but her pussy gave some resistance by clamping on him.
The movement didn’t go unnoticed, and Spitfire pointed at his member.

“Does it normally twitch so much?”

“Em… it’s just happy to see you?” he responded with a smile.

“I thought you were into Dash.”

“Yeah, but you-” Soarin could feel the invisible gaze of Rainbow warning him to choose his words carefully. “-are a close second?”

Spitfire raised an eyebrow, unamused.

“Charming.”

‘She sees this dick and it’s not the least bit interested? The rumors of her preferences must be true,’ thought Rainbow while looking at Spitfire’s form.
The towel barely reached form her breast to her hips, teasing her slender waist, and the shape of the towel around her chest was also alluring to her eyes.
She was a close second to her. And she would take her too when the time was right.

“I came here to speak to you about your performance in todays practice and some strategies I wish to discuss for the coming matches.”

Soarin was about to object, but Rainbow gave him an invisible mischievous smile, and slowly lowered herself onto him again.

“Mmmm, sure. Let’s start.”

“Don’t you want to cover yourself first?”

Rainbow continued moving slowly to not catch to much attention from Spitfire.

“It’s not like I have something to hide that you can’t see now.”

Spitfire shrugged. “As you wish.”

Rainbow had to give credit to Soarin, the guy was maintaining the conversation with Spitfire while having her riding his dick.
Having sex practically in the face of Spitfire without her realizing it was a bizarre and very hot experience, making her desire more.
Rainbow started rubbing her clit while her other hand grabbed her chest, trying to quell the arousal she was feeling. But it wasn’t enough.
Her movements became quicker and more irregular, but fortunately Spitfire seemed too absorbed in the conversation to notice it.

Soarin’s fingers were starting to dig into his seat, trying very hard to maintain his composure.
Never in his entire life he imagined the possibility of having sex in front of her captain with the school’s sports star, and having to maintain a straight face was driving him nuts.
He desperately wanted to just rut Rainbow then and there, and maybe even try and fuck Spitfire since she was there, he was screwed either way.

Suddenly, he felt teeth dig into his shoulder.

Rainbow bit Soarin in the shoulder to silence the moans she wanted so desperately to release and started to move more quickly.
She needed more, but she couldn’t even get him completely inside without making a clap against his legs, giving away their act, but she was starting to care less and less of the consequences.
Let Spitfire see, maybe she could convince her to join them.
She was so temptingly close to climax, but needed just a bit more speed, more force, more-

Spitfire gave a frustrated grunt, making Soarin and Rainbow froze in fear.

“Look, clearly your dick needs some release seeing how much it’s moving on its own, so sorry for interrupting. We can continue tomorrow.”

Spitfire walked away, returning to the girls changing room, leaving them alone once more.

“Great, now we can-” Rainbow was interrupted as Soarin lifted her up and slammed her against the lockers. “Oh shit.”

He started to slam into her with all the pent-up tension and arousal he had been holding during the entire conversation, making them both scream and moan without a care if Spitfire could still hear them.
Rainbow clawed at his back, trying to hold on and resist the pleasure to enjoy more of the moment, but it was impossible.
She bit Soarin one more time as she came, leaving a mark of her teeth as proof of the event.
Soarin came soon after with much more force than ever before, and had the strange show of seeing how his dick slowly filled the insides of Rainbow with his cum.
They both stayed still while their orgasms slowly faded, and finally Soarin pulled out of Rainbow to collapse into the bench, clearly spent from the ordeal.

“So… Are you going to tell why I can’t see you?” He asked, but there was no response. “Rainbow?”

Spitfire opened her locker, looking for her clothes to dress herself, when she felt a pair of hands grab her ass and squeeze it.

“I will claim you soon.” A voice whispered in her ear, and she turned around but saw nobody there.
She put her hand on her chest, feeling her heart racing, and her cheeks hot with her blush.

Rainbow exited the women’s changing room with a victory smile on her face, feeling completely satisfied with the results of her little escapade.
She started to wonder in what other ways she could use her invisibility when suddenly she was hit in the face with a pinch of makeup.

“So there you where darling.”

“Rarity? How did you see me?”

Rarity simply pointed at Rainbow’s hips, and the athlete saw that Soarins cum was still inside her, visible for everyone.
She uselessly tried to cover herself with her hands, but they were also completely transparent.

“Let’s get you to the bathrooms so you can clean yourself,” Said Applejack, appearing behind Rarity and taking Rainbow by the arm.

As the three of them walked through the corridor, Rarity leaned over to Rainbow.

“So, who was the lucky one?”

“Really Rarity? Now?” complained Applejack

“I can’t waste the opportunity for good gossip.”

“It was Soarin. He has it big,” responded Rainbow with a devilish smile.

“Oh, you have someone to compare to?”

“All of the soccer team.”

“Ohhh I will need details.”

Applejack gave an exasperated sigh.

True sight

“Ok, I think I have it ready,” Twilight said, finishing with the last of her calculations in her new invention.

“Are you sure Twilight? You barely slept anything.” Sunset had been watching her over the last minutes with an ever-worried expression. Although she had to give credit to the mad scientist, her work seemed very professional even in her current state.

“I know, but I just can’t stop with this, I have to see to what limits I can take it.”

“That’s not a good motivation to do something potentially dangerous.”

Twilight gave a frustrated grunt. “For the last time, it’s perfectly safe!” she adjusted her glasses. “Now, do you want to be the next volunteer?”

Sunset looked nervously at the weird machine. “I… guess?”

“Em, could I try it?”

Twilight and Sunset looked back, finding Fluttershy looking at them with her usual shyness.

“Of course, step right in,” Responded Twilight, but Sunset stopped her.

“Why would you want to step into this thing?”

“Well, it turned Rainbow invisible. It could be fun. To be able to do that.”

“That sounds more like an excuse.”

“It’s good enough for me!” declared Twilight starting the machine once Fluttershy was in place.

“You did install a reverse function in this thing, right?”

“For the last time Sunset; yes!”

“And you are sure it works?”

“Eh? Oh, yeah… totally.”

“Twilight!”

“No matter, science time! Test of the MMR number two, begins” she declared pressing the button, showering Fluttershy in the white light.

*DING*

Sunset and Twilight looked at the machine, and Fluttershy was standing there, perfectly fine and visible.

“Did it fail?” asked Sunset.

“It shouldn’t have. Do you feel different Fluttershy?”

Fluttershy didn’t respond, her eyes seemingly looking at nowhere in particular.

“Fluttershy?”

“I can see now.” Declared the yellow skinned girl.

“What do you mean?” asked Sunset with a more than worried expression.

“The veil of ignorance has been lifted. The universe is now bare at my sight. It’s vast emptiness and darkness which only blessing is to hide the terrible secrets of the world from our weak, undeveloped minds.”

Sunset took a few steps back, her face now of fear rather than worry.

Twilight was also afraid but tried to keep a straight face and talk. “Come on Fluttershy, we are all people of science.”

Flutthersy looked directly at her, her pupils wide and showing little constellations in their black surface, piercing straight into her soul and beyond, paralyzing her with fear.

“Science? Science it’s just humans trying to pathetically grasp a mere glimpse of the truth. A truth that if it were revealed, their pathetic minds would wish no more than forget it and delve into their blissful ignorance again.” She lifted her arms into the sky. “even know that my eyes have been open, I’m just seeing the shadows of the cosmic beings that transcend our comprehension of existence.”

“Fluttershy, you are scaring us,” said Sunset, her heart racing with fear, and her mind screaming with the inexplicable instinct to flee.

“It won’t matter soon. I can see that this shell of dirt and rock is reaching it’s time to hatch and release the-”

A ray of light covered Fluttershy.

*DING*

There was a moment of silence, as Fluttershy’s eyes returned to normal, and her expression came back to the meek, shy one that sunset and Twilight knew.

“Uh? Did it work?” she asked confused.

“Uh… no, it didn’t, I will see if I can repair it,” Twilight responded, a nervous smile in her face.

“Oh, well, I will wait then.”

Fluttershy walked way from the machine, and Sunset approached Twilight making sure she couldn’t hear them talking.

“What the hell was that?”

“Uhm, a Lovecraftian ray?”

“Twilight! This thing is dangerous!”

“Oh, come on, it didn’t harm her, she doesn’t even remember what happened. Besides, now we know that the reverse function works.”

“Why am I even allowing you to do this?” Sunset exclaimed while rubbing the bridge of her nose.

“Because you are also curios as to what this thing can do.”

Sunset released an exasperated sigh. “Just make sure you don’t traumatize us further.”

“I make no such promise.”