00:40 at the Shuttered Observatory

The house after the funeral was unnaturally quiet.

People always leave traces behind when they come in numbers. The skin of seaweed soup clinging to the bottom of bowls. Black slippers piled by the door. Curtains heavy with incense. But once the sound drained out, the house felt lighter than those leftovers. The condolences, the sighs, the empty phrases that had filled the living room until yesterday had evaporated all at once, and Hae-in found even the echo of her own footsteps unbearable.

She was crouched in front of Do-yun's room, folding cardboard boxes. Since coming home from the funeral she had done nothing but repeat the same motion. Fold, put away, close, take back out. The line between what could be thrown away and what could not kept collapsing. A high-school ID. A convenience-store receipt. An old pair of earbuds. A tumbler covered in constellation stickers. Everything felt trivial in her hands, and that was exactly why none of it could be discarded carelessly.

Her phone rang then.

One short, sharp notification.

She glanced at the screen and froze.

[Haemu Observatory] Your late-night observation reservation at 00:40 has been confirmed. Guest: Yoon Do-yun.

At first she thought it had to be spam. A different person with the same name, maybe. Someone had once said that people fresh out of mourning tie every coincidence to dread. Still, her fingertips turned cold. Under the message sat a reservation number and a guidance line.

Please check in at the ticket kiosk or use on-site voice guidance.

On-site voice guidance.

Hae-in stared at those words for a long time.

Haemu Observatory had shut down after a typhoon the previous summer. It was an old observatory perched above the coastal road at the end of a cliff. The closure had been in the news. City Hall's website still carried the notice. Do-yun had loved stars as a child, yet for some reason his face always hardened whenever that observatory came up. Once his friends had wanted to go there for a night session, and he had refused more firmly than she had ever seen.

Don't go there.

When she had asked why, he had brushed it aside as nothing.

Hae-in opened the message again. Reservation time: tonight, 00:40. The night after his funeral. Guest name: Yoon Do-yun. Her sister had been dead for two days. For this to be a prank, it was too late and too precise.

Then she remembered the note in Do-yun's phone.

A memo she had glimpsed in the empty hallway of the funeral home: Even if you're late, the reservation stays. The sentence had ended there. She had been too dazed then to think about it, but now the words locked into the text on her screen and chilled her from the inside.

She opened her carrier app, then closed it again. A hacked or misfired reservation text could be explained, maybe. What could not be explained was why it had arrived today, in Do-yun's name, from a closed observatory.

The wall clock in the living room read 3:16 p.m.

Even if she left now, night was still far away. Still she snatched up her coat. If she waited, she knew she would lose the courage to go. Once the house grew quieter, once grief settled deeper, she would want to pretend the text had never come.

Before leaving, she looked back at Do-yun's room. A half-open astronomy magazine still lay on the desk. He had always been the sort of person who cleaned even small things to the end, and yet that single issue remained oddly unfinished.

I'm going out for a bit.

She did not know who she was speaking to as she closed the door.

The road to Haemu Observatory looked like a map of the city ending in stages. Outside the bus window the chain-store signs thinned out. Studio buildings and shops grew sparse. Then only the coast road, low breakwaters, and faded seafood signs remained. Rain had fallen all afternoon and only just stopped; the sea was ash-gray. Mist clung low over the wet road surface.

By the final stops, the passengers had thinned to almost none. At the end, Hae-in was alone.

Even the driver glanced back at her when he called the observatory stop.

It's closed right now.

She said she knew. But the moment she stepped into the damp wind, she could no longer explain why she had really come. A woman who had come to a shuttered observatory the day after her sister's funeral because of one reservation text in the dead girl's name. Spoken out loud, it sounded unhinged.

It took about fifteen minutes to walk uphill from the stop. Every other streetlight was dead. Whenever the wind rose, the smell of wet pine needles and salt took turns crossing her path. The sea spread black on her right; on the left lay neglected flowerbeds and broken guide signs.

By the time she reached the gate, the sky had gone fully dark.

The front shutter was down, and a banner reading Temporary Closure Due to Facility Inspection curled wetly at the corners. But the ticket booth side was strangely bright. Not lit, exactly. Only the self-service ticket machine was alive. Because everything around it was dark, that weak white glow floated all the more.

Hae-in walked toward it slowly.

The screen was not on the default idle page. It was already open to reservation lookup, as if someone had just touched it. At the top were the date, the time, and a small instruction: enter reservation number or name.

She reached out, then stopped. Her palms were damp. Entering the name felt like it would make something irreversible. Still, she pressed the keypad.

Yoon. Do. Yun.

The screen flashed faintly with every syllable. When she entered the last one, the lookup page vanished and the reservation information appeared.

Guest: Yoon Do-yun
Time: 00:40
Section: Observation Room 2
Check-in status: waiting for voice guidance

Hae-in stared at the display.

An uncancelled reservation. Waiting for voice guidance. Her sister's name. None of this made sense unless someone had left it there by hand.

Then the old guidance phone mounted beside the booth crackled.

She turned instinctively. Inside the dusty acrylic cover, the gray handset trembled faintly. She could not tell whether it was the wind or something inside the speaker. Below it, a faded notice read after-hours guidance.

Another short electronic hiss.

Hae-in opened the cover and lifted the handset.

At first she heard only wind. Rough breathing, as though the microphone had swallowed dust. Then a voice she knew too well, so well it became almost impossible to believe, came through.

Noona.

She nearly dropped the handset.

It was a recorded message. Short, clipped, leaving little silences behind every line. Yet it was unmistakably Do-yun. The voice she had replayed in her head all through the funeral. The slightly quick ending of her sentences. The habit of her tone lifting a little when she laughed.

If you're hearing this, then you really came.

Hae-in's jaw locked. She wanted to say something, anything, but the recording of course did not wait.

Sorry. I know this feels like a bad joke. But I didn't have another way. Don't stand here long. Check the panel under the ticket booth on the right. Push it with your hand.

A brief pause.

And noona, you didn't come here to see the stars. You know that, right?

Hae-in squeezed her eyes shut. She wanted to be angry. Wanted to demand how Do-yun could drag her out like this after dying, why she had prepared all this alone. But the instant she heard that voice, those emotions collapsed. Before anger came relief. The dead had not returned, yet the voice left behind felt terribly close to life.

The recording resumed.

There's a token and a receipt inside. Don't throw away the token. The receipt matters more. If you're short on time, go to number 7 first.

Static scraped the line.

Sorry for making you come alone. But you needed to know before anyone else.

Then an electronic tone sounded and the line fell dead.

Hae-in stood there holding the receiver for a long time. The sea wind brushed her ankles. Far off, waves hit the breakwater and came late to her ears. Every sound around her was painfully clear, while inside her head everything had gone white.

Do-yun had truly set all of this up.

She hung up the handset and crouched by the panel the recording had mentioned. When she pressed the lower right corner of the frame, a loosened plate popped open.

Inside were a palm-sized metal token and a crumpled receipt.

The token's face was stamped HM-2. On the back, the observatory logo clung on in a faint outline. Hae-in unfolded the receipt first.

Harbor Station Locker 7
Storage expires 05:10
Pickup code required

She checked the time.

4:21 a.m.

Less than an hour remained.

Then her phone rang again.

[Haemu Observatory] Your reservation is not over. The next checkpoint closes before sunrise.

This time a short number followed underneath.

07-143

The pickup code.

Hae-in clenched both the token and the receipt. The metal chilled fast in her hand. The observatory was closed. Do-yun was dead. And yet the reservation chain pointed with perfect precision toward the next place. Too meticulous to be coincidence, too intimate to be anyone else's prank.

She turned back once more to the ticket machine. The reservation lookup page had vanished. The screen had returned to its default waiting state, as if nothing had happened.

That normalcy felt even more frightening.

She ran downhill. The wind stung her eyes and the wet road was slick, but she could not stop now. She still did not know why Do-yun had left this chain. She only knew this was not merely a grief-stricken farewell.

Harbor Station. Locker 7. Pickup deadline 05:10.

And that line: You didn't come here to see the stars.

It meant Do-yun had seen something before dying and had tried to hand it over to her.

By the time the bus stop lights came back into view, Hae-in realized she had been crying without noticing. Her face was wet, though she could not tell rainwater from tears.

No bus would come in time. Her signal was too weak to summon a cab. She stepped out to the road and raised a hand. After a long while an old private taxi slowed.

Where to?

Harbor Station. Please hurry.

Even after the taxi started moving, she did not let go of the phone. She reread the latest message over and over.

Your reservation is not over.

Who was speaking to whom?

Was this all a chain Do-yun had arranged in advance? A sign that someone else was watching it happen? Or had the two already become impossible to separate?

Outside the taxi window, the earliest trace of dawn began to spread over the sea.

Hae-in touched the receipt in her pocket again.

Harbor Station Locker 7 / expires 05:10.

The number brushed against the time the police had once told her Do-yun had been found. The numbers suddenly locked together like one route.

Do-yun had been completing this chain until just before she died.

And the last part of it was still somewhere ahead, waiting before sunrise.