Seo-jun was alone in the lab. Beneath the sterile hum of the fluorescent lights, a printed report and a glowing tablet sat side-by-side on his desk.
The conclusion had already been dictated: No risk detected. No further review required.
Seo-jun read and reread those words, his fingers hovering over the keys. The data wasn't technically wrong. The experimental process showed no glaring errors. Yet, he couldn't bring himself to move the cursor to the summary box and sign off.
Instead, he left a single sentence:
"The results of this study are difficult to utilize as judgment material prior to additional verification."
It was a multi-billion won project. He knew he couldn't simply write 'Failed.' He knew he couldn't outright say it must be stopped.
So, he wrote that it wasn't ready to move to the next stage.
Seo-jun understood the machine. If he wrote 'Disapproved,' the report would be rejected and rewritten by someone else. But if he wrote that it was 'inappropriate for judgment without further verification,' the system would fall into a Pause.
He didn't have the courage to tell the absolute truth, but he wanted to buy time to prevent a lie from passing through. He stared at the screen for a long time after saving that sentence, then slowly closed his laptop. That was the last thing he ever wrote.
[Present Day — 4:12 PM]
Seo-yeon stood before the research archives. The last access record under her brother’s name was followed by a void. No traces of deletion, no edit history. It was as if everything after that moment had never existed.
Then, it hit her. Her brother’s records hadn't disappeared; they had been replaced, laundered into different sentences, and unleashed upon the world.
Stolen from its rightful author, this tale is not meant to be on Amazon; report any sightings.
She opened another folder. A different project. A different experiment. A different author. Yet, the first sentence of every summary was eerily similar. They never mentioned danger. They never mentioned possibility. They simply stated: "May be utilized for judgment."
And beneath those words was always the same name: Han Yun-jae.
Seo-yeon spread several papers across the table and began underlining with a red pen. The dry tone at the end of every sentence, the subtle habit before a period—it was a Linguistic Fingerprint left by the author known as 'Han Yun-jae.'
She jotted down a note in her diary:
[Oppa tried to make it stop. This man made it proceed.]
Finally, she understood why her brother had refused to delete that one sentence until the very end.
[Same Time — Yun-jae’s Room]
Yun-jae was reopening an old file sent by A-12, labeled "For Reference Only." Out of habit, he scanned the summary first.
He froze. A familiar sentence stared back at him.
"Utilizable as external judgment material."
And beneath it, a tiny, lingering comment:
"Additional verification required."
His fingers went numb. He had seen this sentence before. No—he had deleted it before.
At the time, he hadn't thought about its meaning. He had viewed it as a sentence that didn't fit the flow. A sentence that clouded the judgment.
He thought of the name again. Lee Seo-jun. A researcher. A reviewer. And a man who had tried his best not to pass judgment.
Yun-jae closed the laptop. A-12’s words echoed in his mind: "Mr. Han Yun-jae, you have never created a standard. You have merely organized the sentences that could be used as one."
Every word, every syllable now felt sickeningly uncomfortable.
[Night — Seo-yeon’s House]
Seo-yeon opened her brother’s final memo pad again. A short sentence remained at the bottom of the page:
"A single sentence I add might actually save someone."
She couldn't close the book. That sentence no longer felt like hope—it felt like a burden of responsibility. Her brother hadn't made a decision. He had simply held the line to prevent a decision from being made.
She picked up her phone. Her finger hovered over Yun-jae’s name.
Then, she pressed call.
[Next Chapter Preview]
Seo-jun tried to close the door. Yun-jae arranged things so the door would stay open.
Now, Seo-yeon asks why the door only ever opened in one direction. And Yun-jae begins to reread his own words... ...to see exactly how they were being used against the world.
Yoon-Jae organized the fact
that it remained open.
why the door only ever opened
in one direction.
the sentences he once arranged—
how far they have already traveled.