By the time spring turned warm enough for students to start pretending blazers were optional, Mina Lee had learned that rooftops kept secrets differently from hallways.
Hallways amplified everything.
Laughter, gossip, humiliation, advice disguised as cruelty.
Rooftops thinned things out.
Wind stole the sharp edges off voices.
The city spread open far enough that one person’s feelings could almost believe they were private.
The Sound Layer liked that.
It opened more easily near fences, antennae, and sky.
That was why Mina noticed the hiss before she noticed the boy.
Lunch had barely started.
Soomin was still downstairs fighting half the cafeteria for strawberry milk.
Mina had escaped with triangle kimbap, a banana, and the firm intention of eating one meal without spiritual consequences.
Bell wanted sunlight.
Riot wanted “better sightlines in case the building tried anything.” Flux claimed the acoustics were cleaner up high, which usually meant he was bored.
Then the stairwell door opened, the wind hit Mina’s face, and the whole rooftop twitched in static.
Not Noise.
Not the hungry gray grain she had come to recognize in her bones.
This sound was drier.
More technical.
Radio dust.
The scrape of a station that almost existed.
Flux stopped mid-spin on the railing.
“Oh.
Who’s scratching the sky?”
Bell tilted her head.
“It’s not sick.”
Riot narrowed his eyes toward the far corner of the roof.
“No.
But it is hiding something.”
Mina followed their gaze.
Near the old PA antenna, a boy sat cross-legged on the maintenance ledge with a portable recorder in his hands and battered headphones around his neck.
His tie was loose.
One sneaker tapped time against the metal box under him.
His fingers moved over the recorder with lazy confidence, muting, adjusting, waiting.
The static hiss rose again.
He smiled at it.
Not a big smile.
A private one, like the noise had told him something mildly funny.
Mina stopped walking.
“You know him?” Bell asked.
Mina shook her head.
“I do,” said Soomin’s voice from behind her.
Mina jumped.
Soomin emerged from the stairwell carrying two milk cartons and a sandwich, looking like someone who had in fact won a war.
“I thought you were still downstairs.”
“I was.
I triumphed.” Soomin handed Mina a carton.
“And yes, that is Jae.
Or the school rooftop cryptid version of Jae.”
At the sound of his name, the boy glanced over.
His eyes landed on Soomin first, then Mina, then the milk carton in Soomin’s hand.
He lifted two fingers in a lazy salute.
Soomin saluted back with her sandwich.
“See?
Cryptid with manners.”
“Who is he?” Mina asked.
“Production track.
Makes beats for people who are either too desperate or too smart to admit they need him.
Talks like he doesn’t care.
Cares enough to stay up until three fixing everybody else’s timing anyway.” Soomin lowered her voice.
“He’s funny in a way that makes teachers suspicious and sad girls feel seen, which is a dangerous combination.”
Flux grinned.
“I like him already.”
Riot made a face.
“That is not evidence of quality.”
Bell was still listening.
“He doesn’t sound loud.”
No, Mina thought.
He didn’t.
The rhythm around him was precise, almost understated.
Finger tap, heel tap, pause.
But threaded through it was that rooftop hiss, weaving in and out like a second language.
Not infection.
More like interference he had learned to use.
Soomin watched Mina’s expression.
“That look means your brain has left normal traffic again.”
“It’s just a rooftop.”
“Liar.”
“Functional liar,” Mina said automatically.
Soomin squinted.
“You’ve been hanging around Bell too much.”
Mina nearly sprayed banana milk.
At the far corner, Jae slid off the ledge and crouched by the antenna base, holding the recorder toward the cables as if listening for weather.
Wind moved his blazer hem.
He had the body language of someone trying very hard to make effort look accidental.
Flux leaned forward, fascinated.
“He’s sampling interference.”
Riot crossed his arms.
“He’s romanticizing bad reception.”
“I would like to object to how cool that sounds when you say it meanly,” Flux said.
Mina shouldn’t have gone over there.
Every time she followed an interesting sound, her day became less manageable.
She knew this.
Then Jae knocked the side of the antenna with one knuckle.
The resulting vibration bloomed through the Sound Layer in pale silver rings.
Mina moved before common sense could stop her.
Soomin caught her sleeve.
“Where are you going?”
“Just there.”
“That is not a destination.”
“It is today.”
Soomin looked from Mina to Jae and instantly got the wrong idea.
“Oh my God.
Is this because he’s cute?”
Bell gasped.
Flux made a delighted choking sound.
Riot looked ready to leap off the roof for relief.
“No,” Mina said flatly.
“That was a very fast answer,” Soomin said.
“Because it was a very stupid question.”
“Fair.
Go investigate your not-crush.
If he sacrifices you to rooftop spirits, I’m taking your milk.”
Mina walked away before the conversation could get worse.
The closer she got, the cleaner the hiss became.
Not random static after all.
Pattern.
Jae had tuned the antenna into several near-frequencies and was recording the slip between them—the moment one station failed and another almost arrived.
He heard her footsteps but didn’t turn right away.
“Careful,” he said.
“This corner has terrible reviews.”
His voice was quieter than she expected.
Not timid.
Just economical.
Mina stopped a few feet away.
“From who?”
“The wind.
The maintenance cage.
One very judgmental pigeon.” He finally looked over.
His gaze flicked to her lunch, then her face.
“You brought milk.
Brave.”
“Is the roof dangerous to dairy now?”
“Emotionally, yes.”
Against her will, Mina felt the beginning of a smile.
He noticed.
Something quick and sly flashed across his expression, gone almost immediately.
Jae held up the recorder.
“You need something?
Or are you here to arrest me for suspicious use of school air?”
“What are you recording?”
“Evidence.”
“For what?”
He considered.
“Probably drums.”
Flux clutched his invisible chest.
“That’s so obnoxious.
I respect him.”
Riot looked unimpressed.
“He answers everything sideways.”
Bell tilted her head.
“Because straight answers cost more.”
Mina hated when Bell was right that fast.
“You’re making beats out of antenna static?” she asked.
“Among other crimes.
It’s good texture.”
“Most people would call it noise.”
“Most people say a lot of boring things with confidence.”
That landed harder than the joke probably intended.
Mina heard it in the rhythm under his words—a dark click tucked so low most people would miss it.
Before she could answer, a dance club girl approached with a phone in one hand and panic in both eyes.
“Jae, sorry, do you have the edit?”
He didn’t even sigh.
“Hello to you too, Minji.”
“Hi.
Sorry.
Do you have it?”
“Depends.
Are we talking legally, spiritually, or in a format your captain can stop bullying?”
She made a strangled sound.
“Please.”
Jae took her phone, moved fast, transferred a file, and handed it back.
“Try this version.”
“Your mix saved us yesterday,” Minji said.
“Seriously.
You should just do festival audio professionally.”
Jae shrugged.
“Absolutely not.
Then people would expect me to answer emails.”
She laughed and hurried off.
The moment she turned away, the line of his shoulders changed.
Small.
Internal.
A flinch hidden so quickly most people would have missed it.
Bell winced.
“He pushed the compliment away.”
Riot clicked his tongue.
“Like it was sharp.”
Flux’s grin dimmed.
“And fast enough that she didn’t feel the dodge.”
Mina knew that trick.
Jae tapped the antenna again and listened to the ring die out.
“You always come up here to work?” Mina asked.
“Sometimes to work.
Sometimes to avoid people who think group chats are sacred.
Sometimes the roof sounds smarter than the building.”
“Does it?”
“Usually.”
He said it dryly, but not unseriously.
Mina looked out over the city.
Bus brakes sighed three blocks away.
Somewhere below, a trumpet student missed the same note twice in a row and swore on the third attempt.
The roof did sound smarter.
“What do you do with the recordings?” she asked.
“Keep some.
Chop some.
Ruin some on purpose.
Depends what the day needs.”
“Ruin?”
“You can’t make a useful beat if you’re too precious about clean sound.”
Riot made a grudging noise that sounded dangerously like agreement.
Jae’s eyes narrowed a fraction.
“You look like you know what that means.”
“Maybe.”
“Maybe is suspicious.”
“So is everything you say.”
“True.”
A gust of wind hit the antenna.
Static burst once through the recorder speaker, sharp enough that Bell ducked.
Flux looked up.
Riot’s expression changed.
There.
The sound beneath the sound.
Mina heard it a split second later: faint voices, thinner than a real Noise manifestation but carrying the same shape.
Cringe.
Too weird.
Who even listens to this?
Just use the approved track list.
The words weren’t coming from Jae.
They were coming from the bench near the stairwell.
Three first-year boys had lyric sheets spread across the concrete while a fourth held a phone with the speaker on.
A demo track played in awkward little bursts.
Each time they paused it, more static bled out around the speaker grille.
Noise residue.
Small.
Feedable.
Flux straightened.
“Tiny seed at two o’clock.”
Bell flew higher for a better look.
“It’s attached to the phone audio.”
Riot dropped from the railing.
“And the comments are doing the rest.”
Jae frowned—not at the boys, not at Mina, but at the air itself.
He reached up and adjusted one headphone earcup without seeming aware of doing it.
Interesting.
He couldn’t see the Sound Layer.
But he could feel the pressure shift.
The boys’ argument was getting worse in exactly the way Noise loved best.
“I told you the hook sounds dumb when I rap it,” said one of them, tall and red-eared.
“It doesn’t sound dumb,” another said.
“It just sounds—”
“Say it.”
The speaker crackled.
Too much.
Not cool.
Wrong kind of earnest.
Gray static climbed the screen.
Across the roof, Soomin looked up sharply.
She couldn’t see the Sound Layer, but she had become very good at recognizing Mina’s face right before reality got strange.
She started gathering the lunch trash without asking questions.
Bless her.
Mina took one step toward the boys.
Jae looked at her.
“No.”
“You always walk toward other people’s bad ideas this fast?”
“Only on school days.”
That got a quick laugh out of him.
The first-year by the speaker kept talking, voice tight now.
“I’m not saying the beat is bad.
I’m saying if we post something this weird, people are going to roast us.”
The static thickened.
Before Mina could choose an approach, Jae called across the roof.
“Hey.”
All four boys looked over.
Jae held up the recorder.
“If you’re going to self-destruct, can you do it quieter?
Your insecurity is clipping my levels.”
The boys stared.
Then, mercifully, they laughed first.
The static around the phone twitched.
Flux pointed triumphantly.
“See?
Tempo shift.”
Jae walked toward them without waiting for permission.
Mina followed.
The red-eared boy looked half embarrassed, half defensive.
“Sorry, sunbae.”
“You’re not sorry, you’re panicking,” Jae said, reaching for the phone.
“Which is fine.
But panic has terrible taste in arrangement.”
The boy hesitated, then handed it over.
Jae listened to five seconds of the demo.
Rough beat.
Not bad.
Just bare in the vulnerable way unfinished things often were.
The hook had an odd melodic turn that probably sounded too sincere to boys who thought irony was armor.
The gray seed clinging to the speaker grinned at Mina with a tiny mask-face.
“Whose verse?” Jae asked.
“Mine.”
“Whose hook?”
“Also mine.”
“Ah.” Jae nodded once.
“That explains why you want to set the phone on fire.”
The bench group laughed again, softer this time.
The boy’s face twisted.
“Is it that bad?”
“No,” Jae said, and for the first time all morning the joke dropped out of his voice.
“It’s just still yours.”
The words hit the roof like a shift in weather.
Even Riot went still.
The gray thing on the speaker twitched harder.
The boy blinked.
“What does that mean?”
Jae rolled the phone once in his palm.
“It means unfinished stuff sounds embarrassing because nobody’s borrowed it enough yet.
Give it a week and half the school will pretend they were into that exact hook first.”
Flux slapped both hands over his mouth to contain a laugh.
Bell looked like she wanted to applaud.
Riot looked like he hated how effective this was.
Jae handed the phone back.
“Turn the chorus up two notches.
Strip the extra ad-lib before the second line.
Keep the weird part.
That’s the only section with blood in it.”
The red-eared boy stared.
“You really think so?”
“No,” Jae said.
“I’m lying for cardio.”
This time the laughter came cleaner.
The boy laughed too, small and shaky and real.
The Noise seed lost one of its teeth.
Mina stepped in before it could recover.
“He’s right.”
Four heads turned toward her.
Mina ignored the unpleasant sensation of public attention.
“The weird turn in the hook is the part people will remember.
The rest sounds like you’re trying not to be laughed at.”
The red-eared boy winced, because truth did that.
But then he looked back at his phone.
“Yeah,” he admitted.
“Maybe.”
Bell’s voice warmed in Mina’s ear.
“Good.
Stay there.”
Riot muttered, “Don’t soften too much.”
Flux leaned against the fence and whispered, “This is my favorite part.”
The first-year beside the lyric sheets cleared his throat.
“If we actually submit it, people are going to say it’s corny.”
Jae spread his hands.
“People say cafeteria soup is corny.
The standard is low.”
That got another laugh.
Mina added, quieter now, “People say everything.
That can’t be the deciding voice.”
The gray seed recoiled.
It was small enough that rejection worked like weather against smoke.
The mask-face collapsed inward.
Static lifted from the speaker and blew away in the wind.
The Sound Layer thinned.
The rooftop became just a rooftop again: concrete, fence, lunch cartons, one suspicious pigeon pretending not to monitor anyone’s emotional development.
The boys immediately began replaying the hook and arguing again, but differently now—less shame, more actual problem-solving.
One nudged the red-eared boy and said, “Okay, blood section, do it again.”
Jae visibly regretted ever saying that phrase.
Mina, watching him, caught the flicker of satisfaction he failed to hide before he buried it under a shrug.
Soomin raised her milk carton from across the roof like a silent toast.
Mina almost smiled back.
Jae started walking away before the boys could trap him into sustained gratitude.
Mina fell into step beside him.
“You always do that?” she asked.
“Do what?”
“Fix other people’s tracks.”
“Not everyone.”
“But a lot.”
“Enough to stay underpaid.”
“You don’t charge?”
“That would require believing teenagers with performance anxiety have money.”
“That’s not what I meant.”
“I know.” He glanced at her.
“Sometimes people need ten minutes and a second pair of ears more than they need a lecture about artistic courage.”
Bell placed both hands over her heart.
“I like him.”
Riot groaned.
“Of course you do.”
Back at the antenna corner, Jae crouched to grab the recorder.
Mina stayed standing, close enough to see the stickers peeling off the back.
One was just a hand-drawn waveform in black marker.
“You act like you don’t care,” she said before she could stop herself.
The question slipped out too bluntly to fix.
Jae blinked once.
Most people would have dodged immediately.
Mina expected a joke.
She saw the machinery of one spark into life.
Then, unexpectedly, he looked out at the city instead.
“When people think you care a lot,” he said at last, “they start grading the caring.”
Bell went absolutely silent.
Flux’s grin fell away in a single clean line.
Riot’s posture changed, the anger in him briefly becoming something harder to name.
Jae laughed right after saying it, but too late.
The real answer had already happened.
“Anyway,” he added, lighter now, “jokes are cheaper.
Lower maintenance.”
There it was.
The habit Bell had heard.
Humor as smoke bomb.
Humor as armor.
Humor as a way to help without letting anyone inspect the helping too closely.
Mina knew something about that too, though in a different key.
She sat on the edge of the maintenance ledge opposite him.
The banana milk was warm now.
She drank it anyway.
Jae looked at the carton, then her face.
“That’s a terrible decision.”
“I’m committed.”
“To dairy-based suffering?”
“To not wasting things.”
“Very heroic.
Deeply tragic.”
She laughed.
Not because the joke was exceptional.
Because the timing was.
Jae noticed and looked faintly pleased with himself, which seemed fair.
For a while they just listened.
The school bell below.
The slap of a basketball in the auxiliary gym.
Soomin finally leaving the roof with one hand lifted in farewell and an expression that promised interrogation later.
“You make beats out of school sounds a lot?” Mina asked.
“Sometimes.” He nudged the recorder with his sneaker.
“People think they want clean audio until they hear something that actually sounds lived-in.”
“That’s not a bad philosophy.”
“It’s not philosophy.
It’s unpaid labor.”
“Everything becomes philosophy if you say it with enough damage.”
The words left her before she vetted them.
Jae looked at her then—really looked.
The lazy half-distance went out of his face.
“Interesting sentence,” he said.
Mina concentrated on peeling the paper label off her milk carton.
Bell whispered, awed, “You told the truth by accident.”
“Not accident,” Riot muttered.
Jae rested one elbow on his knee.
“You talk like somebody who listens too hard.”
“That sounds insulting.”
“It’s not.
Or only a little.”
“What about you?”
“I listen the normal amount.”
Riot barked a laugh.
Mina raised one eyebrow.
“That’s a lie.”
Jae leaned back against the antenna box.
“Okay.
Counterpoint.
I listen exactly enough to stay out of trouble.”
The wind hissed through the cables overhead.
Static answered.
This time both of them looked up at once.
Not Noise.
Just signal distortion moving through the wires and the air between them.
But Mina felt the faint brush of the Sound Layer opening a seam.
Jae frowned.
“Do you ever get that?” he asked.
Mina went very still.
“Get what?”
“Like certain places have another track under them.” He made an irritated little motion with one hand.
“Not in a mystical way.
More like bad radio.
Same place, two versions, and one of them keeps trying to bleed through.” He scratched behind one ear.
“Roofs do it.
Practice rooms sometimes.
Bus stops when it rains.”
Every hair along Mina’s arms rose.
Bus stops when it rains.
Bell turned so fast she nearly flipped.
Flux whispered something unprintable in delight.
Riot stepped closer to the ledge, eyes narrowed.
Mina kept her face neutral by force.
“That happens to you often?”
Jae’s smile came back, smaller this time.
More deliberate.
“Oof.
See, when you ask it like that, it sounds like a symptom.”
“That’s because it might be.”
“Great.
I’ve always wanted to be medically interesting.”
Bell gripped Mina’s collar.
“He feels the seams.”
Flux was already pacing.
“How much?
Since when?
Why didn’t we notice?”
“Because we weren’t looking,” Riot said quietly.
Jae snapped the recorder shut.
“Relax, earbud girl.
I’m not about to start talking to ghosts or joining a rooftop cult.”
Mina almost choked.
“What makes you think I’m relaxed?”
He smiled again, quick and sideways.
“Nothing.
That’s why it’s funny.”
Then he held out the recorder.
“Want to hear the beat?”
Mina took it.
The headphones were warm from his neck.
She put them on and pressed play.
At first all she heard was wind.
Then the beat entered sideways.
A locker slam pitched down into percussion.
Lunch bell fragments clipped into metallic accents.
Chair legs across concrete turned into grainy snare texture.
Antenna hiss spread underneath it all like weather.
The whole thing moved with the same balance she had already heard in him—casual on top, meticulous below.
And there, hidden in the back third, was the part that made her inhale.
Jae had left the static almost untouched for two bars.
Not cleaned.
Not buried.
Framed.
The result sounded like standing between frequencies and deciding not to apologize for hearing both.
Mina lowered the headphones slowly.
Jae was watching her face with careful indifference, which was only possible if he cared quite a lot about the answer and had practice pretending otherwise.
“Well?” he said.
Bell drifted closer with hands clasped under her chin.
Riot planted himself on the fence post like a hostile gargoyle.
Flux looked ready to vibrate out of his outline.
Mina chose honesty because anything less would have been rude.
“It sounds like the roof kept a diary and you made it dance.”
Silence.
Then Flux actually yelled—inaudibly to humans, but with enough enthusiasm to bend the air.
Riot looked away, which on Riot meant emotional impact severe.
Jae stared at Mina.
“That,” he said after a beat, “is either the best feedback I’ve ever gotten or proof you have a very specific illness.”
“Could be both.”
He laughed.
Real again.
More importantly, he relaxed.
Only a little.
But enough that the static around his shoulder loosened.
Mina handed the recorder back.
“The second section after the bell cut—leave more air before the kick comes back in.”
Jae’s eyebrows lifted.
“You heard that?”
“It’s crowded.”
“Huh.”
There was no performance in that sound.
Just interest.
Genuine, quiet, unexpectedly bright.
For one strange second Mina saw the version of him without the protective jokes.
Not happier.
Not simpler.
Just more directly lit from inside.
Then voices rose from the stairwell door and the moment sealed itself up.
Two theater students spilled onto the rooftop arguing about rehearsal marks.
Jae rolled his shoulders once, putting the easier version of himself back on like a jacket.
“Well,” he said, pocketing the recorder.
“Congratulations.
You are now in the top five people I trust with unfinished audio.”
“How many people applied?”
“Depends.
Are we counting the pigeon?”
Mina snorted.
He pointed at her milk carton.
“Your laugh sounds less worried than your face.”
“That is not a normal thing to say to someone.”
“Neither was the roof diary comment, but here we are.”
The theater students were getting louder now.
Jae glanced toward the door.
“I’m relocating before they start monologuing in self-defense.”
Mina should have said goodbye there.
That would have been the reasonable ending.
Instead she heard herself ask, “Can you send that to me?”
Jae looked back.
“The beat,” Mina clarified.
He studied her for a second, then pulled out his phone.
The case was clear and cracked in one corner.
“You do contacts with strangers?” he asked.
“No.”
“Wow.
Honored.”
“It’s for the beat.”
“Sure it is.”
Bell drifted straight through Mina’s shoulder because she was too delighted to maintain physics.
Flux made kissing noises until Riot punched him through the torso.
Mina ignored all of them with the discipline of someone who had earned her suffering.
They exchanged numbers.
Jae saved hers as Earbud Girl (Roof Witness).
Mina stared.
“That’s terrible.”
“You’re welcome.”
She changed it to Mina before he could protest.
He changed his own contact in her phone to Jae (Questionable Audio) so fast she barely saw it happen.
Then the theater students finally hit the “projecting personal issues through nineteenth-century material” phase of argument, and Jae made a face.
“That’s my cue.”
He started toward the stairwell, then paused and looked back over one shoulder.
“Hey.”
Mina looked up.
“When people grade the caring,” he said lightly, as if they had not been talking about that at all, “it still counts.
Just so you know.”
Before she could answer, he saluted with two fingers and disappeared through the door.
The rooftop went abruptly ordinary.
Wind.
Concrete.
One suspicious pigeon.
Riot landing beside Mina with the kind of force that suggested he wished he had something to punch.
Bell spun three times.
“I knew it.”
“You know everything after two emotional clues,” Riot snapped.
“Because I listen!”
“Because you dramatize!”
Flux dropped onto the ledge where Jae had been sitting.
“Guys.
Focus.
He feels layer seams.
He uses jokes like smoke grenades.
He samples interference for fun and accidentally helped destabilize a seed without seeing it.
That is not standard human rooftop behavior.”
“There is no such thing as standard human rooftop behavior,” Riot said.
“True,” Flux admitted.
“But you know what I mean.”
Mina looked at the stairwell door Jae had gone through.
The place where he’d stood still felt tuned slightly differently, as if his beat had left an afterimage in the air.
Bell settled on her shoulder.
“He’s lonely.”
Riot folded his arms.
“He’s guarded.”
Flux tipped his head.
“He’s interesting.”
“All of those can be true,” Mina said.
The three of them turned to stare at her.
“What?” she asked.
Flux grinned.
“Nothing.
Just appreciating character growth.”
Mina gathered her trash and headed for the stairwell before she had to process any of that.
On the stairwell landing one floor below the roof, Soomin finally caught up to her.
“So,” she said, out of breath but viciously cheerful, “how is your deeply nonexistent crush?”
Mina kept walking.
“Go away.”
“No.”
“That’s not a negotiation style.”
“It doesn’t need to be.
I’m winning already.”
Bell immediately floated backward to watch with interest.
Flux sat on the handrail like he had purchased tickets.
Riot muttered something about human pack instincts being exhausting.
Soomin bumped Mina’s shoulder.
“You were up there a while.”
“We talked.”
“You say that like it’s not the most suspicious possible update.”
Mina shoved her locker key into the wrong pocket, found it again, and glared at the metal door instead of Soomin’s face.
“He makes beats.”
“I know.”
“He samples weird sounds.”
“I know that too.”
“He said unfinished stuff sounds embarrassing because it’s still yours.”
That, apparently, was the wrong thing to repeat out loud.
Soomin’s expression changed.
Not teasing now.
Thinking.
“Yeah,” she said after a moment.
“That sounds like him.”
Mina looked over.
“You know him that well?”
“Not really.
School-known well, not life-known well.” Soomin leaned against the next locker.
“But people go to him when they’re panicking about tracks or edits or intros.
He always helps.
Then the second anyone asks about his own work, he turns into a joke with shoes.”
Bell made a small wounded sound.
Mina closed her locker more carefully than necessary.
“Has he ever submitted anything?”
“Once, I think.
Last year.
Then he pulled it before prelims.” Soomin shrugged.
“Different rumors say different things.
Teacher feedback.
Someone stole a loop.
He hated the attention.
Pick your tragedy.”
Riot’s jaw tightened.
Flux stopped swinging his feet.
Soomin studied Mina’s face again.
“Why?”
Mina adjusted the strap of her bag.
“No reason.”
“Liar.”
“Functional liar.”
Soomin snorted.
“You’re impossible.”
“So are you.”
“True.” She started down the hall, then paused and looked back.
“Just…
don’t go into whatever that is thinking you’re the first person who noticed he hides behind jokes.
You’re probably just the first one he let stay long enough to hear the static.”
Then she left Mina standing there with Bell quiet, Riot angrier than usual, Flux suddenly thoughtful, and the unpleasant sense that the sentence had landed exactly where it was supposed to.
The rest of the afternoon passed under the afterimage of rooftop static.
In literature, Soomin passed Mina a note that read NOT YOUR CRUSH HAS NICE HANDS with a tiny recorder doodled under it.
Mina wrote back DIE QUIETLY.
Soomin added romantic static around the drawing and passed it back with a grin.
In composition lab, Doyun—who now spoke in low doses and hummed when he forgot to stop himself—looked up from his draft when Mina absentmindedly tapped the rooftop rhythm against her desk.
“New sample?” he asked.
“Something like that,” Mina said.
Doyun nodded once, as though that answered more than the words did.
By final bell the school had shifted into its usual after-hours split: club devotion, academy dread, performance rehearsal, soft burnout.
Mina packed slowly.
Bell had already begun planning imaginary friendship recovery arcs between Jae and half the student body.
Riot insisted this was how teams got distracted and died.
Flux was narrating the whole thing like a documentary nobody had asked for.
Then Mina’s phone buzzed.
Unknown audio file received.
From: Jae (Questionable Audio)
Message: roof_static_01.wav
Message: For the girl who compared my beat to a dancing diary.
Don’t leak it or I’ll become unbearable.
Mina looked up so fast Hana, two rows over, frowned.
“You made that face at your phone like it insulted your bloodline,” Hana said.
“Not now,” Mina muttered.
Hana’s curiosity sharpened, but she let it go.
Mina escaped to the older practice-wing stairwell and only then opened the file.
Wind.
Antenna hum.
Then Jae’s beat, rougher than before, still unfinished.
Mina smiled despite herself.
He had left more air before the kick, exactly as she suggested.
The second section breathed now.
The rooftop sounded wider.
She was halfway through the file when Bell suddenly stiffened.
“Mina.”
The tone cut straight through her.
Mina stopped walking.
“What?”
Flux had gone still too.
Riot was already striding closer to the phone as if proximity could make impossibility behave.
“Play that back,” Riot said.
Mina scrubbed five seconds earlier and listened again.
At first she heard only wind and the faint rattle of antenna cable.
Then, under the hiss, a voice.
Bell’s voice.
“His joke landed wrong,” the recording whispered.
“Hear that?”
Mina’s blood went cold.
She backed up until she hit the concrete wall of the landing.
Flux took the phone from her hand before she dropped it and replayed the section himself, face losing all trace of playfulness.
There it was again.
Bell, impossibly clear beneath the static.
Then Flux himself, laughing and saying, “See?
Tempo shift.”
Then Riot, lower and flatter: “Not enough to matter unless he moves.”
The recording ended in antenna hiss and a fragment of Mina’s own laugh.
Silence hit the stairwell.
Bell was the first to speak.
“He recorded us.”
Flux looked up slowly from the phone.
“Not all of us.
Just…”
“Enough,” Riot finished.
Mina took the phone back with numb fingers and stared at the waveform.
It looked normal.
Ordinary digital audio.
Nothing in its shape warned the eye that impossible frequencies lived inside.
Her pulse felt too loud for the stairwell.
Bell hovered closer, voice gone small.
“Humans can’t do that.”
“Most humans,” Riot said.
Flux exhaled once through his teeth.
“Well.
That’s not ominous at all.”
Mina opened the message thread.
There was a second text now, received while she was listening.
Jae: also before you ask, no, I have no idea why there are extra ad-libs on the track
Jae: either your roof is haunted or your timing is contagious
For one suspended second Mina could not decide which possibility was worse: that he truly did not know what he had captured, or that he knew just enough to joke first and ask questions later.
Riot read over her shoulder and swore.
Bell pressed both hands to her mouth.
“He hears more than seams.”
Flux looked weirdly exhilarated and deeply alarmed at once.
“Guys.”
Mina tore her gaze away from the screen.
“What?”
Flux pointed toward the stairwell window.
The Sound Layer was thinning open along the glass.
Not violently.
Quietly.
Like a curtain being pinched between unseen fingers and drawn back just enough to reveal another stage underneath.
Beyond the pane, evening light over Listen City flickered with hidden waveform bridges and silver rails.
For one instant Mina heard, from somewhere not far away and much too close, the faint dry hiss of rooftop static reorganizing itself into a pattern.
A signal answering a signal.
Bell’s eyes widened.
Riot’s entire body sharpened.
Flux grinned without humor.
And Mina, still staring at the impossible voices caught inside Jae’s audio file, understood with terrible clarity that the rooftop meeting had not only been a coincidence.
Something in the city had listened back.