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Daiwa Scarlet strode resolutely through the corridors of Tracen Academy as the evening sun poured in, the stubborn mass of equine meat tucked between her thighs barely impeding her dignified strut. Even with the tiredness brought on by the day’s studies and training, she kept a brisk pace up, hurrying to Tachyon’s laboratory in order to receive her...correction.
The extrusion that had...emerged on Scarlet was, according to Tachyon, not attributable to physiological causes but was rather the result of a “tachyonic storm” that resulted in a “multiversal reconfiguration” which resulted in a “synchronization between parallel counterparts”.
Scarlet knew what those words meant, but how they were supposed to explain her current situation was a little beyond her. Peering at the little screen Tachyon had set up to observe the “tachyonic storm” offered few insights, at least ones that Scarlet found comforting.
“So you’re saying that this...thing, this lumbering brown creature is...me, in another universe? And this...other thing growing on me, is from her?!”
“Yes on the first count, no on the second.” Tachyon chuckled, tapping her foot on the floor to keep herself spinning in her chair at a slow pace. “It appears that the storm picked up countless pieces of detritus on its path through the multiverse, and in so many words slapped that thing onto her before passing her entirety on to you. It’s quite the astonishing situation.”
“I-I don’t care about how astonishing you find it!” Scarlet pouted, resisting her instinct to stomp her foot in anger. “I can’t be seen with this! Can’t you work out a way to fix this?”
“Alas...” Tachyon stopped spinning, allowing the tension in the room to build up for a moment. “...the finer points of quantum physics are not my forte. But...I know someone who knows.” She turned over to her desk, glancing at her grotesque cluster of sticky notes. “Now, where did I put her number? Together we can probably figure it out in a couple days...” Her voice tapered away.
“A couple days?! Senpai, what am I supposed to do until then?”
“You wear skirts, yes? Wear longer skirts. You can borrow my pantyhose from the pile if you need another layer under there.”
“Yes, Tachyon.” Scarlet did not argue. Despite her...odd passions, Agnes Tachyon had never guided her wrong. There was a certain mutual trust between them that to hear the rumors, others rarely extended to Tachyon. Well, she would have her results. Scarlet did not doubt that for even a moment.
Knock, knock.
“Tachyon? I’m coming in.” Scarlet never had to ask if she was in there to begin with. She usually was. Having announced her presence, Scarlet slipped into the room, being greeted by a sight that was a little odder than usual.
A blonde student sat crosslegged on Tachyon’s bed, her head encased by a helmet that left only her face exposed. Two little nubs sat atop the helmet, presumably to accommodate her ears, while several cables ran from ports all over the helmet, connected to a crate-sized assembly on the floor that in turn ran over to Tachyon’s computer.
“Uh, pleased to meet you.” Scarlet gave a polite bow to the newcomer.
“Neo Universe registers your acquaintance.” The blonde returned her a pleasant smile and nod.
“Alright.” Tachyon eased into her seat. “Now that introductions are out of the way, I will explain. Neo Universe here is the only person on campus capable of the perceptual input needed to directly feed information to the chronal harmoniser. Or, to put it more clearly, she’s the software driver and input device needed for it to yield anything useful.” Her hand slipped aside, lifting up an identical helmet. “Once we get started, all we need to do is put this on you and turn it on. Neo will be able to identify the multiversal coordinates we need to drop the other you’s quintessence off safely and you’ll be back to...the way you were. You might feel a little tingly, or like you’re being electrocuted...I’m looking forward to seeing what a quantum synchronization looks like.”
“Then I’d like to get started. Now.” Scarlet folded her arms, her face red. She knew since the other day that someone would have to get involved. She was fine with that, in theory. But Neo was going to look into Scarlet’s mind? The multiverse? Whatever would tell her that she was some kind of whinnying, smelly creature in another universe? At least...she seemed like the type to keep her lips sealed.
“Not quite yet.” Tachyon held up a finger under her sleeve, standing up. “I would, however, like to ask you a small favor. Neo, do scoot over a little.”
Scarlet sighed as Neo obliged. “Name it.”
Tachyon fell onto the space vacated by Neo, leaning back against the wall and giving Scarlet a thin smile that betrayed more curiosity than it did mischief. She spread her legs, confirming the absence of her own pantyhose despite her sweater draping down. “I would like you...to impregnate me. Completely voluntarily, of course. If you don’t want to we’ll get right to the realignment.”
Scarlet’s head snapped to the side as she spat and sputtered. “Senpai?! You want me to...what?!”
“I shall elaborate.” Both Tachyon and Neo remained equally unperturbed as she spoke while rolling up her sweater, exposing her midriff and her genitals in full. “While observing that other universe, I discovered the most fascinating thing. It appears that some particularly interesting compounds were harvested from pregnant mares in that universe. Mares being, of course, the term they use for those among our counterparts who can get pregnant.”
“Wait, are not all of us...mares?”
“Fascinatingly, apparently not. In fact, when I looked at myself in that world, it turns out that I have in fact-”
“Ugh!” Scarlet grumbled, shaking her head. “Back to this. Are you...sure, Tachyon?” Tachyon had an exceptional body, with athleticism that could rival Scarlet or any of her peers. But injuries she suffered had left her...volatile. Wouldn’t pregnancy add to the stress on her?
“As sure as you are, Scarlet.” Tachyon shrugged nonchalantly, as if her entire bare lower body wasn’t exposed to her right now. “The resulting compounds will serve as the foundation of some rather useful supplements if I process them right, and the procedure will yield invaluable insights into Umamusume endocrinology. In my hands it may well be a significant breakthrough.”
“And the baby?! W-we’re making a new life here, Tachyon! What’s the Director going to say if she found out we- and how are we gonna-”
“Shh.” Tachyon put her finger to her own lips. “We’ll figure that out in a year or so, won’t we? Or, you can just say no. And we move on with our lives.”
“...” Scarlet looked down for a moment. “I’ll do it.” If anyone else had made that request, it’d be a resounding “no”. But Tachyon, who cared so much for her...this was something she could do to repay that care, right?”
Lifting her skirt, she hooked her thumbs into the elastic waistband of Tachyon’s pantyhose, and the spats and panties she had put on under them. Kneeling, she rolled all three garments down to the floor, stepping out of them in the process. The pulsating, fleshy mass grew erect as it was exposed to the warm air of the room that began to fill with an unmistakable musk.
She had spent the past few days tucking and covering that thing up the best she could, not letting it impede her training in any way. Somehow...Vodka didn’t notice. Was she really that oblivious? Could she not see Scarlet’s...excitement if she wasn’t literally waving it in her face? Other than Tachyon, she was the only other person Scarlet would think to use it on. But perhaps in a few minutes, it wouldn’t matter any more...
“Wait...” It was only now that Scarlet recalled the other person on the bed. “Is she gonna...”
Tachyon turned her head to look at Neo. “Neo, blinder on.”
With a tap of a button on the helmet and a thumbs up, a faceplate slid down, covering Neo Universe’s eyes. She continued to gaze straight ahead, impassively.
“See? That works for you, right?” Tachyon grinned.
“Alright. Phew.” It was time. Scarlet hopped in place, limbering up a bit like she was about to do a sprint. “So I should...uh...” There was no room for hesitation. When the gates opened, you stepped forward. One step after another. Every racer knew that. Scarlet pitched down, her pigtails pooling around Tachyon’s face and her ample weight pressing down on her chest. Their lips met, and parted. Tachyon yielded to Scarlet with a contented moan, letting her tongue probe the insides of her mouth, brushing over the tips of her teeth and entwining with her own tongue.
“Tachyon...senpai...” Scarlet slipped her hand under Tachyon’s neck, cradling the back of her head as she kissed downwards, her lips lavishing their affection on her jaw, then her throat. Easing her grip, Scarlet lifted her upper body off Tachyon a little, leveraging the motion to thrust straight into her as far as she could go, without hesitation.
“Scarlet...ghhh...!” Tachyon was always so in control, so focused. Pain could not make her falter. But in this moment, another sensation took over, and she ceded the lead to her beloved junior. One hand clenched Scarlet’s arm tight, and the other pulled Scarlet down by her shoulder, putting her in range of a fierce lip bite.
Yelping in pain, Scarlet thrust deeper, with embarrassment, pain, and desire for her senpai spurring her on. As she pushed past Tachyon’s cervix, her jaw released its grip on Scarlet’s lip, an agonized, ecstatic moan escaping her throat. And despite the pain she must be feeling...she tightened, deliberately. Every muscle in her body focused on the task of constricting around the rare gift Scarlet had been given, heightening her pleasure as she so graciously granted Tachyon’s request.
For her part, Scarlet slipped her hand up Tachyon’s sweater, cupping her breast, massaging it the way she would want herself, her thumb slipping over Tachyon’s erect nipple. A sideways glance yielded the insight that Neo Universe had tilted her head back to look out from under the blinder, giving her the appearance of looking down her nose at the two mares mating before her. She remained unmoving, otherwise.
“Tachyon, I think I’m...close...” The tension built up in Scarlet’s thighs and her swollen balls. She most certainly knew what “getting close” felt like, but she’d never quite felt it this way before.
“Good.” Tachyon wrapped her legs around Scarlet’s waist, her shins crossing against Scarlet’s twitching tail. “Make sure you don’t spill a drop.”
“I...I won’t...I won’t...ahnnn!” Scarlet’s face scrunched up and she thrust straight into Tachyon, her shaft pushing straight through to the back of her womb. As her seed spewed forth, filling every square inch of that chamber, Tachyon clawed at the sheets, the warm fullness and the glorious, glorious pain bringing her to climax as well. Scarlet spurted and Tachyon clenched and snarled, the nasty, ecstatic look in her red eyes betraying her exhilaration.
Finally, the two lay still, panting like they had just run a marathon. Like, a really hard one. Scarlet sighed and made to pull out, only for Tachyon to tighten her grip in every way possible. “Now, I think you’ll have to stay there for a while. We need to make absolutely sure my ovum gets fertilized, after all...”
It took a while more before they finally came apart, but then it didn’t take long for them to get the other helmet on Scarlet, who was sitting calmly with Neo as if she and Tachyon weren’t both pantsless and sticky. “Ready!”
“I am also prepared.” If Neo had any opinion on prior events, she kept it to herself.
“And here...we...go!” Tachyon flipped a cover off a big red button connected to her computer by a USB cable, apparently entirely for effect. She raised her hand dramatically, and slammed it down.
A flash.
Scarlet felt like she had been shot in the face, the impact knocking her all the way to the edge of the universe. Images flashed by of a world that was much as it was, a lifetime differing in every way except the highlights.
The Oka Sho. The Queen Elizabeth Cup. Winning the Arima Kinen. Saying goodbye to Vodka, far too soon.
And...bearing many foals?
At the beginning, Tachyon was her-
The images swept away, as her mind desperately tried to keep a grip on them. Inexorably, they disappeared into the void, like a dream that one remembers only vaguely.
And everything went dark.
Scarlet awoke lying straight on her back, in Tachyon’s bed. The room still smelled densely of sweat, musk, and slick. A cursory examination revealed that neither of the other two people present had elected to dress her or Tachyon before Neo left, and she had in fact returned to the way she was before.
“Ah, you’re awake.” Tachyon swiveled her chair towards her, flashing her a smile. “Had a nice dream? You were clawing at the air in front of you. Perhaps when presented with alternative possibilities, fair or foul, few can resist the instinct to grab at them.”
Scarlet exhaled. “Let’s...not talk about that.” Unable to resist the urge to glance between Tachyon’s legs again, she couldn’t help but note the small trickle of her semen pooled on the chair, most of it apparently still in Tachyon’s womb. “Are you...feeling alright?”
“I’ve had worse.” Tachyon responded, with a tone that suggested she was not generally inclined to measure her suffering on a sliding scale. “I’m quite looking forward to planning my dietary adjustments and exercise schedule, and of course analysing each one of my urine samples...”
“Hah...” Scarlet sighed. “...thank you, for helping me. I was right to come to you first...” And come for her, the President might note.
Rising from her chair, Tachyon eased into bed next to her. “Think nothing of it. However, if this occassion ever arises again...maybe you could try calling me ‘dad’ while we do it.”
Despite the dryness of her delivery, Scarlet couldn’t help blushing a deep red. “Senpai...!”
The coming year was going to be very interesting...