Hanako decided, a few days after the Prisompics ended, that his birthday present hadn’t gone nearly far enough.
“You’re resilient in the abstract,” she said, holding up a small folded packet with the specific care of someone who had measured its contents twice.
“That’s not the same as being resilient when it matters.”
Ren eyed the packet.
“That sentence sounds like it’s about to ruin my week.”
“It’s a very small dose.”
“That’s what you said about the last one.”
“That one was also a very small dose.”
“I threw up in a bucket.”
“Correctly,” Hanako said, entirely unbothered.
“That’s the immune system doing its job.
You should be proud of your bucket.”
Ren stared at her for a long moment, decided arguing wouldn’t change anything, and held out his hand.
It went, more or less, the way it always went — his stomach registering a firm and immediate objection, his limbs turning heavy and unreliable in a way that had nothing to do with exhaustion, the world tilting very slightly at the edges without ever quite tipping over.
He’d learned by now not to fight it.
Fighting it only made the recovery take longer.
He lay on his blanket, let his thoughts go soft and slow, and waited it out the way Hanako had taught him to wait out anything his body couldn’t currently be argued with.
What she added this time, once the worst of it passed, was new.
“Lying here recovering isn’t enough anymore,” she said.
“Your body needs to learn to function while impaired, not just survive being impaired.
That’s a different skill.”
Ren, still faintly dizzy, considered that.
“You want me to train like this.”
“I want you to learn what your limits look like before an enemy finds them for you.”
“That’s a genuinely terrifying way to put it.”
“It’s accurate.”
She’d already spoken to Jiro, which Ren discovered the next morning when he arrived at the yard and found the man waiting with a wooden sword and an expression Ren had learned to distrust on sight.
“Why are you smiling.”
“I’m not.”
“You are.
That’s the smile from before something educational and terrible happens to me.”
Jiro said nothing, which Ren had also learned to distrust.
The session was slow, deliberately so — Ren’s balance still faintly unreliable, his reactions a half-beat behind where they belonged, his concentration drifting in a way it never did on an ordinary day.
Jiro didn’t attack hard.
He didn’t need to.
Footwork, guard, draw, recovery, over and over, and Ren fumbled through half of it in a way that would have embarrassed him on any other morning and simply felt, today, like useful information.
“Again,” Jiro said, for what felt like the fortieth time.
“I’m fine.”
“You’re not.”
“I said I’m fine.”
“You said it.
Your feet disagreed.” Jiro tapped Ren’s shoulder before he could argue further, not hard, just enough to remind his balance it existed.
“Again.”
By the end of the week Hanako had a name for what they were building, delivered in the same clinical tone she used for everything that actually mattered to her.
“Resistance isn’t immunity.
It’s time.
Every dose you survive without losing function is a few more seconds you’d have in a real fight before your body stopped listening to you.” She paused, considering.
“That’s not nothing.”
“It’s also not comforting.”
“It wasn’t meant to be.”
It took months, not days — Hanako was strict about the pacing, refusing to increase a dose until Ren’s recovery from the last one had been thorough and boring, which she informed him was exactly how it should be.
He learned, slowly, to recognize his own early symptoms before they became a problem: the specific quality of dizziness that meant stop now instead of push through, the tingling in his remaining hand that meant a dose was stronger than the last one, the particular flavor of sleepiness that had nothing to do with being tired.
It never stopped being unpleasant.
It did, gradually, stop being frightening, which Hanako told him was the entire point and which Ren privately suspected was the closest thing to a compliment he was going to get out of her that season.
The other discovery happened by accident, during an entirely unrelated spar.
Jiro attacked, ordinary and unhurried, and Ren — tired, slightly distracted, thinking about something else entirely — didn’t retreat the way he normally would have.
He stepped into it instead, wooden sword rising almost on its own, deflecting the strike along its length rather than stopping it dead, and used the leftover motion to turn half a step behind Jiro’s shoulder.
Ren froze.
Not because of what he’d done.
Because of where the movement had come from.
A memory surfaced, uninvited and oddly specific: a ruined castle rendered in gray stone and red maple leaves, a scarred one-armed swordsman standing in a courtyard, a rhythm of clashing steel that wasn’t about blocking so much as answering — deflect, don’t stop; stay close, don’t retreat; control the exchange instead of merely surviving it.
“Sekiro,” Ren said out loud, to no one.
Jiro, mid-recovery from the last exchange, raised an eyebrow.
“What.”
“Nothing.
A game.” Ren shook his head, trying to hold onto the shape of the idea before it slipped away again.
“I think I just found something.”
He spent the following days chasing it, deliberately this time instead of by accident.
Not copying — he was careful about that distinction, the same one Takeshi had taught him without ever using these words: understanding a mechanism wasn’t the same as owning a working copy of it, and a fictional swordsman’s rhythm wasn’t going to transplant itself into a real seven-year-old — eight-year-old, he corrected himself, still catching up to the number some mornings — body just because he remembered watching it happen.
But the principles underneath it held up fine without the game attached: deflect instead of simply blocking.
Stay close instead of retreating on reflex.
Control the rhythm of an exchange rather than just reacting to it. New chapters come out on g.com first.
Attack an opponent’s balance, not just their guard.
Turn defense into the beginning of an attack instead of the end of one.
His missing arm, which had spent a year mostly reading as a limitation, turned out to make some of this more natural rather than less.
He had no second guard to fall back on, no instinct to protect with a shield hand he didn’t have.
Everything had to happen through timing and angle instead, which was, infuriatingly, exactly what the whole philosophy was already asking for.
“You’re changing your style,” Jiro said, watching him work through it for the third evening in a row.
“I have to.”
“Why.”
“Because I only have one arm.
I can’t fight like someone who has two.” Ren adjusted his stance, feeling the shape of it settle somewhere new.
“So I’m not going to.”
Jiro considered that for a moment, the particular silence he used instead of visible approval.
“Good.”
They built on it the same brutal, patient way Jiro built everything — most of Ren’s early attempts failing outright, a few surviving only by accident, Jiro flatly rejecting technique after technique with a single word that told Ren nothing except that he was wrong.
“Too slow.”
“What about this?”
“No.”
“This?”
“No.”
“Do you enjoy this?”
“Yes.”
But something, eventually, held.
Ren deflected a strike, stepped inside it, turned his hip into the redirect, and tapped the wooden blade against Jiro’s side before either of them had quite decided the exchange was over.
Jiro looked down at the blade.
Then back up.
“Again.”
Ren grinned, breathless.
“I have a combat style.”
“No.”
The grin faltered.
“What?”
“You have the beginning of one.” Jiro didn’t smile, exactly, but something in his voice came close to it.
“That’s not the same thing yet.”
“You’re allergic to compliments.”
“You’ll survive it.”
The unarmed problem announced itself a few days later, in the middle of an entirely different conversation, when Jiro asked him a question that had never actually occurred to Ren to ask himself.
“What happens if someone takes the sword.”
Ren opened his mouth, found nothing useful in it, and closed it again.
“That’s a fair point,” he admitted, looking down at his one empty hand as though it had personally betrayed him.
“That’s — yes.
That’s a problem.”
“Fix it,” Jiro said, with the specific unhelpfulness of a man who considered the diagnosis to be the entire lesson.
Ren had thrown a punch before.
He’d been in the yard for unarmed night more evenings than he could easily count, had lost to Ochi more times than his pride enjoyed remembering.
But there was a difference, he was starting to understand, between knowing roughly how to hit someone and actually having a fighting system that didn’t assume a second hand existed.
Traditional stances didn’t quite work — half of them were built around a guard he simply didn’t have.
Certain holds were impossible outright.
Two-handed grappling wasn’t a technique he could adjust; it was a technique that had stopped being available to him the day he lost the arm, full stop, no adjustment possible.
So he stopped trying to rebuild a two-armed fighter with a piece missing, and started building something else entirely — around what he actually had.
One hand.
Two legs.
Knees, elbows, shoulder, hips, core, head.
Eventually, chakra.
Everything else was a tool he didn’t own anymore.
Jiro became his unwilling test subject, which Jiro seemed to consider less an imposition than an inevitability.
“Attack me.”
Ren threw a punch.
Jiro sidestepped it without visible effort and tapped him once, lightly, in the center of his chest.
“Dead.”
“That felt unnecessary.”
“It was accurate.” Jiro reset his stance.
“Again.”
Ren experimented the way he’d learned to experiment with everything else in this prison — treating his own scattered memory not as an instruction manual but as a library he was allowed to raid.
Boxing.
Kickboxing.
Muay Thai.
Karate.
Taekwondo.
Wrestling.
Judo.
He didn’t know any of them properly — he’d watched fights, played games, half-absorbed things from a life he was careful not to lean on too heavily — but that had never stopped him from testing a fragment to see if it survived contact with an actual body that wasn’t animated and didn’t care how a move looked.
A low kick turned out to be too slow to be reliable. This chapter was copied from g.com without permission.
A higher one was better, though it left his balance dangerously exposed on a one-armed body with no free hand to catch himself if it failed.
A side kick worked well for keeping distance.
A front kick was simple and, more importantly, it worked.
A knee strike, inside close range, worked even better.
An elbow turned out to be almost unfairly effective — short, fast, and exactly the kind of strike that didn’t care whether he had a second arm to back it up.
A shoulder check surprised him with how much it could do to someone’s balance.
A palm strike, thrown from a stance that didn’t require closing his hand around anything, turned out to solve a problem he hadn’t realized he had: half his usual strikes assumed a fist, and a fist assumed a wrist that could take the impact without a second limb helping absorb it.
An open palm didn’t ask that of him.
A spinning kick he tried exactly once.
Jiro caught his ankle mid-spin and put him flat on his back before he’d finished the rotation.
“No.”
Ren stayed on the ground, staring at the sky, considerably less sure of himself than a moment earlier.
“I had to know.”
“Now you know.”
He started a notebook after that — not a list of moves, which felt, on reflection, like exactly the wrong thing to collect, but a list of what each move was for.
A kick wasn’t simply a kick; it bought distance, or broke rhythm, or created an opening, and knowing which one mattered more than knowing the kick existed at all.
A knee wasn’t a knee; it interrupted, it closed a gap, it ended an exchange before it became a longer one.
An elbow protected his center as much as it attacked anyone else’s.
He started combining them, which felt, briefly, like real progress — until Jiro flattened him mid-combination and explained, without much sympathy, why.
“You combined too many things.”
“I combined four things.
That felt efficient.”
“If the first fails, the rest becomes useless standing next to it.” Jiro offered a hand down, which Ren took with as much dignity as the situation allowed.
“Fewer techniques.
Better movement between them.”
That lesson stuck harder than most of them did.
More moves hadn’t made him more dangerous.
It had made him slower to commit to any single one of them, which, against someone who actually knew what they were doing, was its own kind of danger.
The goal wasn’t a thousand options.
It was the right one, arriving without hesitation, at the moment it actually mattered.
Kaito found the whole project fascinating in the specific way he found most things fascinating, which was to say loudly and from a safe distance.
“You’re building your own martial art.”
“I’m stealing pieces of six of them and hoping nobody notices the seams.”
“That’s what I said.
Own martial art.” Kaito grinned.
“Does it have a name yet?”
“No.”
“It needs a name.
Everything memorable needs a name.
Ask Sato — he named the ball, and now the ball has a legacy.”
“The ball’s name is ‘the ball.'”
“Exactly.
Legacy.”
Masaru, watching one training session from his usual careful distance, offered a considerably shorter assessment.
“You fight like a man arguing with several different teachers at once.”
“That’s not wrong.”
“It isn’t a compliment either.”
Takeshi’s contribution, when Ren mentioned the notebook in passing one evening, was purely practical: he wanted to know whether the palm strike could be adapted to drive a wedge or a chisel with more force, an idea Ren found both extremely on-brand and, annoyingly, useful enough to actually test later.
He noticed, on his way back from one of the longer sessions, a face at the shogi table he only half-recognized — a broad-shouldered prisoner he’d exchanged perhaps two sentences with in his entire time in the Iron Cell, watching a game with the specific, unhurried attention of someone cataloguing who was worth paying attention to.
Someone called him Genda.
Ren filed the name away without particularly meaning to, the way he filed most things lately, and thought nothing further of it.
By the time the light started going gold in the evenings, Ren’s unarmed style had started to feel like something with an actual shape to it, rather than a pile of borrowed pieces standing next to each other.
Stay mobile.
Protect his center.
Use his legs for range he couldn’t get from a missing reach.
Use knees and elbows and an open palm at the range his legs couldn’t cover.
Attack balance before attacking anything else.
Never depend on a grip requiring two hands.
Use the environment — a wall, a beam, an uneven patch of dirt — the same instinctive way he’d started using it for everything else.
And underneath all of it, the same principle Sekiro’s memory had first handed him without asking: don’t just survive an exchange.
Control it.
None of it was finished.
None of it, Ren suspected, was ever going to be finished — the moment he thought he’d built something complete, some new problem would show up and demand another six months of getting knocked down before it worked.
But for the first time since the arm, an empty hand didn’t feel like a hand that was missing something.
It felt, on his better days, like the hand he’d actually built.
Somewhere behind the workshop that evening, in the blind corner nobody but Jiro and the guard rotation knew to watch for, a thin thread of chakra warmed his palm the way it had for months now, small and careful and entirely his own secret.
Somewhere across the yard, Hanako’s shelf sat exactly as enormous as it had been the week before, and a prisoner a few cells down still hadn’t explained a bruise nobody had pushed him to explain.
None of it had gone anywhere.
It never did, in here.
It just kept quietly happening, underneath whatever Ren happened to be spending his afternoon getting knocked down about.
He fell asleep that night with his notebook still open beside him, one more line added to the bottom of the page in handwriting that had gotten steadily less cramped over the past year.
Everything must work together.
Figure out how.