The first sound Sera Lin recorded that semester was a bicycle bell.

Not a remarkable one. Not the kind that appeared in poems or on the covers of journals sold at airport bookshops. It was a cheap bell mounted on a secondhand bicycle ridden by a first-year student who had not yet learned that the path between the eastern gate and the Glass Cafeteria was too narrow for speed, and it rang twice — once in warning, once in apology — before the bicycle disappeared around the corner of the arts building.

Sera pressed stop. Looked at the waveform on the recorder’s small screen. Saved it as: *sound_031_bicycle_bell_eastern_path_0742hrs.*

Thirty-one down. Sixty-nine to go.

The Blue Stairway was empty at this hour. That was why she came here first on the opening day of every semester — before the breakfast rush from the dormitories, before the upperclassmen who liked to sit on the middle landing and drink canned coffee and complain about the administration, before the first-years who moved in uncertain clusters and took photographs of the cherry trees with expressions of people who understood they were supposed to feel something. At 7:40 in the morning in the second week of March, the Blue Stairway belonged to no one except the light.

And the light, this morning, was doing something worth recording.

It came through the cherry trees at an angle that only existed for approximately eleven minutes each spring — Sera had timed it, two years ago, standing in this exact spot with a notebook and an unreasonable amount of patience. The trees on either side of the stairway grew toward each other overhead, and in early spring before the leaves came in fully, the blossoms filtered the morning sun into something that moved. Not steady. Not still. Gold, then shadow, then gold again as the branches shifted in the small wind that came off the sea before seven each morning and disappeared by nine.

She was not recording the light. She was recording what the light did to sound.

Because sound changed in light like this — or rather, her perception of it did. The footsteps of the one other person on the stairway, a graduate student in the architecture program who made this climb every morning with the same measured pace, sounded different when the shadows moved. Closer. More present. As if the light breaking apart also broke apart the usual distance between things.

Sera sat down on the third step from the bottom, where the stone was warmest from yesterday’s sun, and let the recorder run.

The campus woke up around her in layers. First the birds — two sparrows conducting a disagreement in the plum tree near the gate, a single crow on the gymnasium roof who seemed to have opinions about the morning. Then the mechanical sounds: the vending machine outside the student union cycling through its internal calibration, the generator behind the sports complex humming its low and constant note, the elevator in the arts building that always announced its arrival with a particular two-tone chime. Then the human sounds, arriving in fragments: a window opening on the third floor of the main building, voices in the dormitory common room carrying across the courtyard in the way voices did when the air was still cold and sound traveled further than people expected.

She listened to all of it.

This was the part no one else understood about her project. Not really. They heard the title — *One Hundred Sounds of Spring* — and imagined something picturesque. Cherry blossoms and wind chimes and birdsong over a gentle piano track. Something you might find on a relaxation application, something designed to make people feel that nature was essentially decorative.

That was not what she was collecting.

What she was collecting was evidence. Proof, as her grandmother had said. Not that spring was beautiful — that was obvious, that required no documentation — but that it had existed at all. That on this particular morning, on this particular stairway, these specific sounds had occurred in this specific order and would never occur again in exactly this configuration. The bicycle bell and the sparrows and the vending machine and the light through the cherry trees at the eleven-minute angle: this had happened. This was real. Whatever came after, this had been.

She pressed record again.

The sound she captured next was the stairway itself — not the footsteps or the wind or the birds, but the specific acoustic signature of a space that had been rained on for many years and had absorbed that history into its stones. There was a resonance here that did not exist anywhere else on campus. She had tried to describe it once in a seminar paper and had settled, finally, on: *the sound of somewhere that knows it is not permanent.*

Professor Kuroda had written in the margin: *Good. Say more.*

Sera had not said more. She was still working out what more meant.

She checked the time. Seven fifty-three. The stairway would start filling in about seven minutes — first the punctual ones, then the hurried ones, then the ones who had given up on punctuality and moved through the world with the particular peace of people who had accepted certain consequences. She had exactly seven minutes of this quality of silence left.

She used all of them.

By the time the first cluster of second-years came down from the dormitory hill with their bags and their coffees and their morning conversations, Sera had thirty-four recordings and was walking toward the center of campus with her head slightly tilted, which was how she walked when she was listening to something no one else could hear.

The hum of the water feature near the administration building. The way sound pooled in the covered walkway between the library and the lecture halls. The specific silence of the courtyard at the moment between the last bird and the first real noise of the day. These were the things she was always cataloguing, always filing away in the system she had built inside herself over years of paying this particular kind of attention.

She stopped at the edge of the small ornamental pond near the center of campus — a shallow, decorative thing, the kind of campus feature that existed to make prospectus photographs look serene. The water was still this morning. A petal from the early-blooming tree near the north entrance had drifted to the center of the surface and sat there, not moving, as if it had decided this was where it intended to be.

Sera sat down on the stone ledge beside it.

She pulled out her small notebook — separate from the recorder, separate from her academic notebooks, used only for this project — and wrote: *sound_035: the pond at 0801hrs, no wind, one petal, the particular silence that comes before a campus fully wakes.*

Then she looked at the running total. Thirty-five sounds. Sixty-five remaining.

She turned back a few pages to where she had written, at the start of this semester: *8 weeks. Spring does not wait.*

It was not a complaint. It had never been a complaint. It was simply the operational reality of her life, the same as the scratch on the recorder screen and the appointment card tucked into the back pocket of her notebook and the knowledge — settled now, familiar, no longer sharp in the way it had once been — that the sounds she was collecting existed in a kind of double urgency. Spring was ending. And other things were changing too, slowly, in the architecture of how she received the world.

She did not let herself think about that directly. She thought about the sixty-five sounds still needed, and the eight weeks available, and the specific problem of the covered walkway near the library, which had a resonance she had not yet found the right conditions to capture.

The recorder was old. Older than everything else she owned.

Her grandmother had pressed it into her hands on a Tuesday afternoon in late July, the last summer before everything changed. They had been sitting on the wooden steps outside her grandmother’s house in the hills north of the city, and the afternoon was the kind that exists only in the memory of summers you did not know you were memorizing, warm and slightly overripe, the light coming through the persimmon tree in long amber columns. Her grandmother had gone inside and come back with the recorder wrapped in a cloth the color of old moss, and she had placed it in Sera’s hands with the particular care of someone transferring something fragile.

*Record everything,* her grandmother had said. *So you always have proof that the world was beautiful.*

Sera had laughed a little. *That’s a big job for a small recorder.*

Her grandmother had smiled. *It’s a small job. You just have to start.*

Eight months later, her grandmother was gone. And four months after that, Sera had sat in a small office with an audiologist who had explained, with the careful language of someone who delivered this particular kind of news regularly, what progressive sensorineural hearing loss meant and what it did not mean and what the trajectory might look like and what management options existed.

Sera had listened to all of it with the recorder in her bag.

She had not recorded any of it.

Some things were not for keeping.

The casing of the recorder was worn at the corners where she had held it thousands of times. The screen had a small scratch across the upper left quadrant that she had put there herself, age nineteen, during a session when her hands had not been steady. She had learned to record around the scratch, to position the waveform display so the important data fell to the right of it.

You learned to work around things. You learned what could be compensated for and what could not, and you made your adjustments, and you kept going.

Spring did not wait. So neither would she.

She was still looking at the pond when she heard it — or felt it, more accurately, a vibration through the stone ledge before the sound fully arrived: footsteps, moving fast, somewhere on the path that curved around the north side of the arts building. Fast and irregular. The kind of footsteps made by someone carrying something that was affecting their center of gravity in ways they had not fully accounted for.

She raised her recorder. Footsteps had always interested her. People’s gaits were as individual as voices — she could identify Sumi by the particular syncopated rhythm of her walk, could tell when Professor Kuroda was coming down the corridor before she rounded the corner, had catalogued without meaning to the sonic signatures of dozens of people who moved through her life regularly. These footsteps were unfamiliar. Heavy, hurried, slightly off-balance. Carrying something large, from the sound of it — something that rattled faintly, like a structure under stress.

She pressed record.

The footsteps rounded the corner of the arts building and she could see him now: tall, dark-haired, arms full of what appeared to be an architectural model of considerable ambition and questionable structural integrity, moving at a speed that was impressive given the circumstances and almost certainly inadvisable given the narrowing path ahead. The model was large enough that it blocked most of his forward vision. He was navigating primarily by momentum and optimism.

The path narrowed further. Curved toward the pond.

Sera watched this approaching situation with the stillness of someone who has already calculated the outcome and found it inevitable.

She had time to move. She did not move.

Later, she would not be entirely sure why. Perhaps because the recorder was still running and she did not want to break the take. Perhaps because some part of her, the part that had spent two years cataloguing the sounds of this campus in all their variety, recognized that what was about to happen was, in its way, a kind of sound she had not yet collected.

The footsteps did not slow down.

They grew louder instead, and the rattling of the model grew louder with them, and then the path turned and the pond appeared and the person carrying the model tried to adjust his trajectory and the model swung wide and caught Sera across the shoulder with the corner of what appeared to be a carefully constructed but now critically damaged representation of some kind of structural design.

The recorder left her hand.

For a moment — a very specific, very clear moment that she would remember in detail for a long time afterward — she watched it arc through the morning air above the ornamental pond, spinning slightly, the scratch on the upper left quadrant catching the light once before it hit the surface of the water with a sound she had never recorded before and would never need to.

A small splash. Precise. Final.

The petal that had been sitting at the center of the pond drifted outward in the ripples.

Sera looked at the water. Then she looked at the boy standing beside her with half a model in his arms and an expression she would later describe to Sumi as *the face of someone watching a natural disaster they caused themselves.*

She said nothing.

The morning continued around them: the sparrows, the vending machine, the generator, the elevator’s two-tone chime. All of it still happening, indifferent and ongoing, as it always was.

Sera looked at the pond for three more seconds.

Then she pressed stop on the recorder she was no longer holding.

The boy with the broken model was still standing there.

He had lowered what remained of the structure to his side and was staring at the pond with an expression that had moved past shock into something quieter and more complicated. She could see him calculating, the way people did when they were trying to determine the full scope of what had just gone wrong. His mouth opened. Closed again. He looked at her, then at the pond, then back at her.

“I—” he started.

“Don’t,” she said.

He closed his mouth.

The recorder was at the bottom of approximately forty centimeters of ornamental pond water. She knew this. She was processing this. She was also, in some compartment of her mind that operated independently of the shock, noting the irony: that the instrument she had used to prove the world was beautiful had been silenced by the world being entirely ordinary. Careless and loud and spatially unaware in the way that people were when they were running late and carrying things too large for the path.

She stood up from the stone ledge.

The morning light was still doing its thing through the cherry trees. The sparrows had resumed their argument. Somewhere across campus, a door opened and a voice called out a name and was answered. The world was continuing to be full of sounds she was not recording.

Sixty-five sounds. Eight weeks.

The recorder, which had been her grandmother’s hands pressing something important into her own, which had traveled with her through the worst year of her life and had never needed to be repaired, which contained in its memory card a file she had not been able to bring herself to delete or to listen to completely because three seconds of an imperfect recording was both more and less than she knew how to hold — that recorder was now at the bottom of a decorative pond on the campus of Seiha University at eight-thirteen in the morning on the second week of March.

She looked at the boy.

He was looking back at her with the expression of someone who understood that an apology was necessary but had not yet determined what scale of apology the situation required.

She said: “Stay here.”

Then she took out her phone and called Sumi.

Sumi answered on the second ring, which was faster than usual, which meant she was already awake, which was unusual, which meant something had already gone wrong with Sumi’s morning too and she was waiting for someone to talk to about it. This was, Sera noted, the particular mathematics of having a roommate: your emergencies and their emergencies rarely cancelled each other out.

“I need you to bring the waterproof bag from under my desk,” Sera said. “The one with the desiccant packets. And the secondary recorder. I’m at the center pond.”

A pause. “Why are you at the— wait, did something happen to your recorder?”

“Please just bring the bag.”

Another pause, shorter. “I’m coming.”

Sera hung up and turned back to the pond. The ripples from the recorder’s landing had long since settled. The surface was still again. The petal that had been displaced was nowhere she could see.

Beside her, the boy had set down the remains of his model on the stone ledge and was looking at the water with the focused expression of someone who was about to do something impractical.

“I can get it,” he said.

She looked at him. He was wearing clean clothes. It was eight-fifteen in the morning on the first real day of the semester and he was wearing clean clothes and carrying what had been, before the incident, a reasonably impressive model, which meant he had somewhere to be and something to present and a schedule that did not include wading into ornamental ponds.

“The water is cold,” she said.

“I know.”

“The pond is maintained by the grounds department and they add something to prevent algae. It smells.”

“I know.” He had already set down his bag and was unlacing one shoe. “I dropped it. I’ll get it.”

Sera watched him take off both shoes and set them side by side on the ledge with an automaticity that suggested this was not the first time he had needed to remove his shoes in a hurry for reasons he had not planned.

He stepped into the pond.

The sound he made — a sharp, controlled exhale through the nose, the sound of someone meeting cold water and deciding not to acknowledge it vocally — was, Sera thought distantly, exactly the kind of small human sound she had been trying to collect all morning. Specific. Involuntary. Evidence of something real.

She did not have a recorder.

He reached the center of the pond in three steps, bent down, and came up with the recorder in both hands, water running off it in thin streams. He held it up. She could see from where she stood that the screen was dark and the casing had collected a smear of pond sediment along the bottom edge.

He waded back and held it out to her.

She took it.

The recorder was wet and cold and heavier than it had any reason to be. She turned it over in her hands. The scratch on the upper left quadrant was still there. Of course it was. Some things did not change just because everything else did.

The boy was standing in approximately twelve centimeters of ornamental pond water in his socks, holding his wet trouser hems up with one hand and looking at her with the expression of someone who wanted very much to know if what he had done was enough.

It was not enough. It could not be enough, because the recorder had been in water and what it contained had been in water and whether the file was recoverable was a question she could not answer yet and did not want to think about yet.

But he had gone in to get it. Without being asked. With clean clothes and somewhere to be.

She said: “Your name.”

“Riku,” he said. “Riku Han. I’m a fourth-year in Sensory Industrial Design. I’m so sorry. I wasn’t watching where I was going and I was late and the model is — that’s not important. I’m sorry. Is the recorder— can it be fixed? I can fix things, I have a lab, I have equipment, I can—”

“Stop talking,” she said.

He stopped.

The campus moved around them, indifferent and bright. Cherry petals came down in the small wind, landing on the surface of the pond, on the broken model, on the shoulders of his jacket. He stood in the water and did not move and did not say anything, because she had told him not to, and she found this — against all expectation — slightly less unbearable than everything else about the morning.

Sumi arrived four minutes later, slightly out of breath, carrying the waterproof bag and the secondary recorder and an expression of someone who had rehearsed several possible scenarios on the way over and was now recalibrating rapidly upon encountering the actual one.

She looked at Sera. She looked at the wet recorder in Sera’s hands. She looked at the boy standing in the pond.

“Okay,” Sumi said carefully. “So I have questions.”

“Bag,” Sera said.

Sumi handed over the waterproof bag. Sera placed the recorder inside with the desiccant packets and sealed it.

The boy had finally stepped out of the pond and was standing on the ledge in wet socks, the ruined model at his feet, watching her with the focused attention of someone waiting for a verdict.

Sera picked up her notebook and her bag. She looked at him.

“Sound Archive Room,” she said. “Building C, third floor. One hour.”

She walked away before he could answer.

Behind her, she heard Sumi say: “So should I… also go? Or—”

And then the cherry trees took the sound, and the morning took everything else, and Sera walked back up the Blue Stairway alone with her secondary recorder and sixty-five sounds still left to find.