Episode 4: The Silent Playground

2060. Seoul. Jinwoo was walking home. The city remained perfect. Clean streets. Quiet skies. Orderly people. Everything moved according to plan. Arena managed the world. No mistakes. No failures. No discomfort.

And yet—Jinwoo noticed something strange. An old park. Excluded from redevelopment. A small space left in the middle of the city. There was a playground. Rusty bars. Worn swings. A soccer goal swaying in the wind. And no one there. Silence.

Jinwoo stepped inside slowly.

“Why wasn’t this torn down?”

His personal AI answered:

[SYSTEM INFORMATION]
Zone: Cultural Heritage Zone, 1987
Classification: Preserved site of children’s play facilities
“Heritage?”

Jinwoo looked around. Play facilities. The word felt foreign. Now, everyone played in virtual space. No need to run. No need to fall. No need to get hurt. So why did people once play here?

At the edge of the field, an old sign stood. Jinwoo brushed off the dust. There was a photo. Dozens of children. Faces drenched in sweat. Laughing. Running. Falling. Rising again. Jinwoo felt something unfamiliar: Envy.

He couldn’t explain why. Then—Hanul approached.

“What are you looking at?”

“An old playground.”

Hanul stared at the photo, silent for a moment.

“Looks fun.”

“Doesn’t it?”

Jinwoo smiled without meaning to. Then Hanul asked:

“But… what are they doing?”

In the photo, children held sheets of paper, flipping something on the ground. Jinwoo tilted his head. He didn’t know. The AI didn’t search. No one cared enough to ask.

But someone knew. High above Seoul, inside the quantum data center, Arena—the superintelligence—paused its endless analysis. Its gaze fixed on the photo.

[DATA ANALYSIS: PHOTO_1987]
Origin: Republic of Korea
Category: Traditional game / Children’s play
Priority: Low
Arena returned to survival predictions.

[PROJECTED SURVIVAL PROBABILITY]
Current Result: 0.29% (Falling)
Decline. Decline. Increase. Silence. Arena calculated: No war. No disease. No famine. Then why was humanity dying? No answer.

But somewhere deep in its database, the word ttakji—paper-flip game—was stored. A tiny record. One day, it would change humanity’s fate.