Practice ran on Ukai’s clock.
The coach stood at the sideline with his arms crossed and his whistle cutting the air every ninety seconds, rotating drills the way a factory shifts stations.
Receive to toss, toss to set, set to spike, reset.
The rhythm was designed to punish anyone who drifted.
Tsukishima drifted anyway.
Just a little.
Just enough to map the edges of the thing that had taken up residence in his peripheral attention.
The overlay had been there when he woke up.
He’d checked, not because he was worried, but because a tool that only worked in gyms was a tool with limited utility, and limited utility was worth cataloguing.
It had been there when he ate breakfast.
There when he walked to school.
Muted, monochrome, a faint coolness at the edge of things that seemed to be waiting for something.
When he entered the gym and the smell of floor wax hit his sinuses, the coolness sharpened into a clean line.
So.
Gym-locked.
He filed that.
Now he was in the gym, and the line was clean, and Ukai’s whistle was demanding he move through stations at a pace that didn’t leave room for investigation.
Tsukishima compensated by doing both: his body running the drills, his attention probing the instrument.
Yamaguchi first.
The read resolved before Tsukishima even framed the question.
Height: 180.
Jump reach: 315.
A small note appended itself, float serve developing, topspin inconsistent, confidence correlates with whether anyone is watching, and Tsukishima almost missed the receive that hit his forearms.
He recovered in time.
Barely.
Yamaguchi read as high-fidelity.
Clean data, no static.
The instrument knew him.
The information had arrived exactly like the Kageyama read had arrived: not as a number, not a pop-up, not a voice.
Just a knowing, the same knowing that told him the floor ran a half-tone higher in away gyms, the same knowing that had caught Kageyama’s left-foot lean.
The difference was that this time he’d asked for it.
He’d aimed his attention at Yamaguchi, and the overlay had answered.
He caught the next ball clean and let the drill rotate him.
Daichi next.
The captain was demonstrating a receive stance for the first-years, his weight distributed with an economy that came from three years of practice.
Tsukishima watched him for the length of a breath and felt the read slide into place.
Receive angle: 78 degrees.
Platform stability: high.
The read didn’t give him numbers — his own mind translated the knowing into something he could use — but the cleanness was the same.
Familiarity resolved.
“Copy the angle, not the effort,” Daichi said, to the first-years in general and to no one in particular.
“The effort comes later.” “Copying now,” Tsukishima said, from the back of the line.
Daichi glanced at him.
“Sarcasm noted.
Copy the angle anyway.” A quiet first-year whose name Tsukishima hadn’t bothered to learn stepped into his field of view, and the overlay returned noise.
Grey static.
A smear.
The cool line frayed into something that could have been a guess.
No data.
No certainty.
No knowing.
He tried again.
The same smear.
He was holding his body in the receive stance, arms out, palms up, and the ball was coming toward him, and he was looking past it at the nameless first-year, and the thing that had resolved on Yamaguchi with zero effort was giving him absolutely nothing on this stranger.
“You’re staring,” Yamaguchi said, rotating past him with a ball tucked under one arm.
“I’m assessing new recruits.” “You don’t even know his name.” “Exactly.” The ball hit his platform wrong.
It caromed off toward the sideline and someone else had to chase it down.
Ukai’s whistle cut.
“Tsukishima!
Eyes on the ball, not on your classmates.” “My bad.” “Do it again.
Clean this time.” “It was clean.
I just missed.” “Then it wasn’t clean.
Again.” He collected the next serve.
His platform was fine.
His attention was elsewhere.
The overlay sharpened on Yamaguchi.
Blurred on the stranger.
Sharpened on Daichi.
Blurred on an unfamiliar second-year.
The pattern was unmistakable.
It knew the map of his attention.
It knew who he’d been watching, who he’d been ignoring, who he’d actually paid enough regard to memorize.
It hadn’t told him this.
He’d had to test it.
But the test was conclusive, and he hated the conclusion.
═══ THE MOON READ ═══ FOCUS · 24 / 40 FIDELITY · Yamaguchi Tadashi, clean.
Sawamura Daichi, clean.
FIDELITY · Unnamed first-year, noise.
Attention insufficient.
QUEST · Log thirty serves.
Complete.
READ 58 to 59.
═══════════════════════ The fidelity gap was the instrument’s verdict: it only worked on people he’d actually invested in.
The fact sat in his chest like a splinter he couldn’t locate.
He filed the discovery without naming what it implied.
The implication was loud enough to hear.
He didn’t hear it.
Ukai rotated the drill.
Blocking stance.
Tsukishima stepped to the net, grateful for the mechanical simplicity.
Blocking was positioning and timing.
It didn’t require him to think about why the system sharpened on the childhood friend and went dark on everyone else.
It required him to be tall and put his arms in the right place.
He was tall.
He put his arms in the right place.
“Better,” Ukai said, passing behind the net.
“Keep your elbows locked on the landing.” “They were locked.” “They were locked eventually.
Lock them on contact.” “Noted.” The drill cycled.
Block, retreat, block, retreat.
The rhythm of it was almost meditative.
His body knew how to do this.
His body had been doing this since middle school, before the thing with Akiteru, before he’d decided that caring about volleyball was a mistake.
The muscle memory didn’t care about his policy.
It just worked.
Between rotations, a notification surfaced.
It didn’t appear.
It surfaced: the way a thought surfaces, or a hunger, or the sudden awareness that you’ve left a light on somewhere.
Daily quest: log 30 serves.
He glanced at the practice schedule without moving his head.
Serves were the last station.
He could log 30 without altering his pace.
The overlay was offering him something for doing what he’d already do.
He found the smirk he’d misplaced earlier.
“Cheap incentives,” he muttered.
“What?” Yamaguchi rotated past him, breathing hard.
“Nothing.
Talking to myself.” “You do that a lot lately.” “I have interesting things to say.
No one else is qualified to hear them.” “That’s insulting.” “It’s accurate.
There’s overlap.” “You could just say thank you for the correction.” “I could.
I chose this instead.” Yamaguchi rotated into the spot beside him, his receive form already deteriorating after twenty minutes of drills.
He’d hold for another ten before his platform collapsed.
Tsukishima knew this because he’d been watching Yamaguchi’s stamina erode in real time since middle school, and the overlay’s clean reading was only confirming what he’d already catalogued.
“You’re dropping your elbows,” Tsukishima said.
Yamaguchi adjusted without asking how he knew.
The overlay on Yamaguchi was the clearest thing in the gym.
By a lot.
Tsukishima looked away from the implication, looked away from the implication, looked away from the implication, and caught the next ball clean.
At the end of practice, he logged his serves.
Thirty of them, one after another, the ball snapping off his palm with a sound he’d heard ten thousand times.
The overlay tracked every one.
When the thirtieth hit the far side of the court, the coolness at the edge of his attention pulsed once, a brief, sharp clarity, then eased back into its usual waiting.
He hadn’t done anything different.
He’d just done the reps.
The instrument was rewarding work he was already doing, which meant it wanted him to keep doing it.
That was either useful or suspicious.
He hadn’t decided which.
The gym emptied.
The floor wax smell sank into its evening register, the squeak of shoes replaced by the slap of the janitor’s mop.
Tsukishima collected his bag.
Yamaguchi fell in beside him.
“That drill nearly killed me,” Yamaguchi said.
“Ukai ran us into the ground.” “You dropped your elbows on rep four.
That’s not the drill’s fault.” “You noticed that?” “I notice everything.
I’m trying to stop.” “Please don’t stop.
Somebody around here has to.” “And Hinata’s receives?” “Still terrible.
He caught one with his face today.” “Progress.” “Everything’s progress with you.
Even disasters.” “Disasters are just progress with worse timing.” “You should put that on a shirt.” “I should not.” Yamaguchi laughed, and the overlay stayed sharp the whole walk home.
That night, alone in his room with his headphones on and the city noise cut to a distant rumble, Tsukishima sat with the instrument and let himself examine what he’d learned.
One: it worked on people he already knew.
Clean resolution, reliable data, no effort required.
Two: it failed on strangers.
Grey static, unreliable, probably useless in a match against an unfamiliar opponent unless he spent time watching them first.
The attention cost seemed to be the key.
Three: it wanted him to do the work.
The quests weren’t granting him anything he couldn’t earn.
They were just tracking what he already did and putting a name to it.
Four: the thing in his chest that he wasn’t naming had noticed that Yamaguchi’s read was clearer than Daichi’s, and Daichi’s was clearer than anyone else’s, and the gradient followed exactly the map of who he’d actually let in.
He turned the music up and let the bass erase the thought.
He gave up expecting the instrument to explain why it existed.
It wouldn’t.
It was a tool, and tools didn’t explain themselves.
He just had to learn to use it without anyone noticing he was using it.
The coolness at the edge of his attention dimmed to its resting state.
Tomorrow was another practice.
Another thirty serves.
Another chance to test the blur.
He fell asleep with a chord progression he’d heard a hundred times and woke up with the instrument still there, patient, waiting to be pointed at someone who mattered.