When they got involved, no one expected it would go that far.
A seemingly ordinary mission, a missing witness, and a door that cannot be opened. They were dragged into the same system, traveling repeatedly between ruins and pipes, from the ground to the underground, and from the underground to the back of the moon.
Some people left a path in front, while others followed behind and sealed the door.
He didn't know who put those clues, and he didn't know whether each piece he found was spelling out an answer or walking into a position that had been arranged long ago.
But he couldn't stop.
——And that person was walking two steps behind him.
Purpose: Build a better society together
