Vigilante A was doing a routine inspection in the sky. Lately, humans disappeared from time to time and were typically tied to some other humans, such that a group of them vanished together.
In the beginning, Sir System was extremely excited as it thought that a big demon that engulfed humans had appeared. Who knew, when the yellow dog was sent to investigate on this, it found out that it was just a common migration movement.
In former times, "humans strive to move up in society while water naturally flows downwards", now, "water streams upwards whereas humans start to descend in society".
Humans flooded like an endless stream towards rock masses thousands of meters deep, wave after wave, and a significant proportion of them were humans with high-level educations.
Those who were educated were truly precious resources.
