Episode 1. The Raid Never Ended

A gray envelope slid across Seo-eon's workbench just after dawn, as though the rain had delivered it by hand. A screw rolled off the table and hit the floor, but he did not bend to pick it up. On the front of the envelope, where a sender or recipient should have been, there was only a single printed line.

[Patch note delivery target: surviving support unit Seo Eon]

He could not bring himself to open it right away. Ever since he walked out of the dead tower alive, anything that looked even remotely like a system message made his fingers lock up first and his lungs second. The kind version of the story called him the only survivor of the twenty-third raid. The cruel version, which most people preferred, called him the support alchemist who mistimed a buff and killed his entire party. For a full year he had hidden in the back room of a repair shop near the sealed zone, fixing broken charms and saying as little as possible.

When he finally tore the paper seal, the sheet inside felt strangely warm, like a receipt printed only seconds earlier.

[Resolved]
- Delayed death-flag reflection for Adventurer #114 corrected

[Known issue]
- Floor 17 caretaker echo continues consuming reserve mana
- Combat logs on Floor 28 were altered through an unauthorized method

[Action required]
- On-site verification required from surviving support unit Seo Eon

At the bottom was the raid credential number he had used on the day of the final attempt. It had been invalidated long ago. Whoever had made this knew far too much to be playing a prank.

Before noon he closed the shop and headed for the outer perimeter. The tower still stood in the reclaimed land north of the city, its black walls holding the smell of wet iron even after a year. Sanctuary chains wrapped around the entrance exactly as they had on the day it was sealed. But when he brought the paper close to the inspection sigil, faint light spread across the surface. One locked rune after another slid aside, and the main gate opened with the exhausted reluctance of a machine admitting an old mistake.

“What am I supposed to do now?”

The tower gave no answer. It simply accepted him.

The first-floor lobby was too clean. The blood from the last raid was gone. The shattered stone idols were gone. That should have made it easier to breathe, but it did the opposite. Nothing had been cleaned. The place felt preserved, as if the final moment had been archived and was now being replayed under better lighting. The wall lamps lit a beat too late. Gold navigation letters appeared only after he passed them, following him like delayed subtitles.

At the landing to the second floor, another note appeared in midair. Not paper. Not quite a screen. More like a sentence that had decided it no longer needed a surface.

[Hotfix pending]
- Support unit has entered the field
- Echo synchronization resumed

The word echo made the back of his neck go cold.

That was what the tower called the traces it retained after death. It had always stored combat patterns, not only from monsters but from people. Training material claimed that, in a full-party wipe, the final seconds of a raid could remain behind as a safety snapshot. Seo-eon had seen the footnote once, years ago, in a systems manual nobody took seriously. He had never met anyone who had actually returned to witness it. The living rarely volunteered to walk back into the place that had finished the job.

The lift to Floor 17 still worked. Inside the metal box, he kept his eyes lowered to avoid the mirror sheen on the doors. When they opened, cold was not the first thing that reached him.

“Seo-eon, one more amplification ampoule!”

Han Se-rin's voice.

The battlefield on Floor 17 remained trapped in the instant the last raid collapsed. Echoes in black armor stood along the wall in interrupted poses, and at the center Se-rin turned with her sword half raised. No, not Se-rin. Her echo. The same torn cloak hung from one shoulder, just as it had on the final day. Her eyes were sharp and living, but the shadow at her feet followed a beat behind her body.

Without thinking, Seo-eon reached for the belt where he used to keep his support kit. He had returned all of that equipment months ago, but his body still remembered the rhythm of the raid.

“Why are you late?”

When the echo asked him that, he realized he had never truly left this place at all. The question carried habit before blame. That made it harder to bear.

A wall panel behind her flickered and spat out a fresh line.

[Critical]
- Floor 17 caretaker echo awaiting input
- Response required from support unit

Seo-eon slowly opened the hand that had been crushing the patch note. The tower had never properly ended. And someone, or something, had been waiting for him to come back.