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The starting gate at Tokyo Racecourse thrummed with the usual pre-race tension. Sixteen horse girls lined up in their stalls, ears twitching, legs bouncing with coiled energy. The packed grandstands roared with eighty thousand voices, all united in their love for the sport, their bets, and their favorite daughters of speed.
And then there was Agnes Tachyon.
She sat in lane twelve. In a wheelchair.
Not a motorized wheelchair. Not some experimental jet-propelled contraption from her lab. Just a standard-issue hospital wheelchair with squeaky rubber wheels and a faded "Property of Tracen Academy Infirmary" sticker peeling off the armrest.
"WHAT."
Jungle Pocket's voice cut through the ambient noise like a knife through wet paper. The brown-haired horse girl whipped around in her starting position, her orange ribbon bouncing with the violence of the motion. Her jaw hung slack. Her nostrils flared so wide you could park a bus inside them.
"What the HELL is that?!"
Agnes Tachyon adjusted her glasses with one pale finger, the lenses catching the autumn sunlight. Her smile was the kind that belonged on someone who'd just discovered a new fundamental particle—or was about to commit arson. Possibly both.
"Ah, Jungle Pocket-kun." Her voice was silk draped over broken glass. "How delightful to see you."
"Don't you 'how delightful' me! You're in a— you can't— this isn't—" Jungle Pocket's hands flew through the air, gesturing wildly at the wheelchair, at the track, at the heavens themselves as if demanding God explain this nonsense. "THE TENNO SHO ISN'T FOR PEOPLE IN CHAIRS!"
The race official—a sweating middle-aged man clutching a rulebook like it was a life preserver—shuffled forward. His eyes darted between Jungle Pocket and Tachyon with the desperation of a man who'd already checked the regulations seven times and found nothing helpful.
"A-Actually, the rules state that any registered horse girl may compete using any non-motorized means of locomotion, so long as the means are self-propelled and—"
"I WASN'T ASKING YOU!"
The official retreated so fast he nearly tripped over his own shoes.
Tachyon's fingers drummed a slow rhythm against the wheelchair's armrests. Her tail swished lazily behind her, threading through the gap in the chair's back. "The rules are quite clear, Jungle Pocket-kun. I filed the proper paperwork three months ago. Form 7-B, subsection twelve, paragraph four: 'Alternative Locomotive Devices.' The committee approved it unanimously."
"They— what— unanimously?!"
"Mm. The chairman was particularly enthusiastic." Tachyon's smile widened a fraction. "Something about 'unprecedented innovation' and 'refreshing competitive spirit.' I may have also contributed a sizeable donation to the stadium's renovation fund."
Jungle Pocket's left eye twitched.
Krsh-krsh-krsh.
Tachyon rolled her chair forward and back experimentally, the rubber wheels squeaking against the turf. "The acceleration curve is fascinating, really. The coefficient of friction between vulcanized rubber and grass, combined with the leverage dynamics of the wheel radius versus my arm span—"
"I'M GOING TO KILL YOU."
"After the race, perhaps." Tachyon tilted her head. "Assuming you can catch me."
The other racers had stopped their warm-ups to stare. Symboli Rudolf's expression had gone carefully blank. Mejiro McQueen's mouth was moving, but no sound was coming out. Oguri Cap was eating a rice ball, because of course she was.
The starting bell rang.
CLANG.
Fifteen horse girls exploded forward in a thunderous surge of hooves and determination—legs pumping, arms swinging, ears pinned back against the wind. The Tokyo Racecourse erupted with the roar of the crowd as the pack surged through the first furlong.
Agnes Tachyon leaned forward in her wheelchair.
Her hands gripped the wheel rims.
And she pushed.
FWOOOOOSH.
The wheelchair shot forward like a purple-haired missile, cutting through the pack with a velocity that defied physics, God, and basic human decency. The wheels screamed against the grass—a high-pitched EEEEEEE that pierced through the announcer's frantic babbling.
"AND AGNES TACHYON TAKES THE LEAD— I— WHAT— SHE'S IN A— THE WHEELCHAIR IS— I DON'T— I NEED A DRINK—"
Jungle Pocket's legs burned as she pushed herself harder, her breath coming in sharp gasps. She was supposed to be in front. She was supposed to be the one they were chasing. She was a Tenno Sho contender, damn it, not some—
Krsh-krsh-krsh-krsh-krsh—
The wheelchair pulled alongside her.
Tachyon's face was serene. Not even sweating. Her arms worked the wheels with mechanical precision, each push generating forward momentum that absolutely should not have been possible. The stadium wind caught her hair, streaming it behind her like a victory banner.
"Your form is quite good today, Jungle Pocket-kun." Tachyon's voice was somehow perfectly audible despite the roaring wind. "But you seem tense. Shoulder tension affects stride length, you know. A seventeen percent efficiency decrease, by my calculations."
"SHUT. UP."
"Also, your left foot pronates slightly. Have you considered custom orthotics?"
Jungle Pocket screamed—a raw, primal sound of fury—and threw everything she had into her legs. Her muscles shrieked. Her lungs burned. She pulled ahead by a nose, then a neck, then—
Krsh-krsh-krsh-krsh-KRSH-KRSH-KRSH—
The wheelchair accelerated.
"Fascinating!" Tachyon called out as she rolled past, her tone one of genuine scientific interest. "Your maximum output appears to be approximately 2,400 watts. Impressive for organic locomotion, but insufficient against optimized mechanical advantage."
"I'LL GIVE YOU MECHANICAL ADVANTAGE—"
The final stretch loomed ahead. The finish line gleamed in the autumn sun.
Tachyon's arms were a blur. The wheelchair's wheels had stopped squeaking—they were spinning so fast they'd transcended sound itself. The Tracen Academy sticker had long since torn off, disintegrated by the sheer speed.
Eighty thousand spectators had gone silent.
Not because of awe.
Not because of horror.
But because literally no one knew what emotion to feel anymore.
Tachyon crossed the finish line three lengths ahead of the pack.
The wheelchair's momentum carried her another twenty meters before she gently applied the brakes—a casual squeeze of her gloved hands against the wheel rims.
Skreeeeeee.
She stopped.
She turned.
She waved at the crowd with the casual grace of someone who'd just won a Nobel Prize for destroying competitive running forever.
"AGNES TACHYON WINS THE TENNO SHO AUTUMN." The announcer's voice was flat. Defeated. The voice of a man whose faith in the sport had just been fed through an industrial shredder. "In... in a wheelchair. She wins... in a wheelchair."
Jungle Pocket crossed the line in second place.
Her legs gave out immediately. She collapsed to her knees on the turf, chest heaving, sweat dripping from her chin. Her vision swam. Her everything hurt.
Krsh-krsh.
The wheelchair rolled into her peripheral vision.
"Excellent effort, Jungle Pocket-kun." Tachyon's shadow fell across her prone form. "You shaved 0.3 seconds off your personal best. Truly commendable."
Jungle Pocket lifted her head.
Her eyes were the eyes of someone who had stared into the abyss and watched the abyss pull out a rulebook.
"Why."
"Hm?"
"Why." The word crawled out of Jungle Pocket's throat like it was dying. "Why did you do this. Why did you— in a wheelchair— you could have just— you're not even— WHY."
Tachyon considered the question.
Her head tilted to one side.
"Science."
Jungle Pocket's face hit the grass.
"Also, you told me last month that I 'couldn't beat you if I was on wheels.'" Tachyon's smile had too many teeth in it. "I wanted to see if you were correct."
A muffled scream rose from the turf.
The crowd had finally remembered how to make noise. It wasn't cheering, exactly. More of a collective confused wailing that echoed off the grandstands and probably reached low Earth orbit.
Special Week pushed through the gathering crowd of officials and horse girls, her face pale. "T-Tachyon-san! That was— you can't— the JRA is going to—"
"Investigate thoroughly, issue formal complaints, and ultimately be unable to disqualify me because I violated no existing regulations?" Tachyon's glasses glinted. "Yes, I expect so. I've already prepared the legal defense. Seventeen pages, single-spaced."
"You prepared a legal defense before the race?!"
"Of course." Tachyon patted the wheelchair's armrest fondly. "Good science requires anticipating experimental outcomes."
The trophy presentation was scheduled in fifteen minutes.
No one was entirely sure what to do about the wheelchair.
Eventually, they just rolled Tachyon onto the podium—chair and all—and handed her the Tenno Sho trophy. She held it up with one hand while the other remained casually on the wheel rim, her smile unchanged, her tail swishing with quiet satisfaction.
Jungle Pocket refused to stand on the second-place platform.
She sat on the ground next to it instead, wrapped in a shock blanket, staring at nothing.
Someone handed her a juice box.
She didn't drink it.
She just held it, crinkling the wrapper slowly, rhythmically, like a person processing profound trauma one squeeze at a time.
Krsh-krsh.
Tachyon wheeled over to her.
"Same time next year, Jungle Pocket-kun?"
The juice box exploded.
Three weeks later, the JRA's emergency regulations committee convened to add seventeen new clauses to the competitive racing guidelines, all of which could be summarized as "For the love of God, no wheelchairs."
Agnes Tachyon was already working on her next project.
Something about roller skates.