Now even “it” was swearing.
All of the military equipment that modern civilization was proud of suddenly had inexplicably exploded.
The reason was unknown. It just disappeared as if it had never existed in the first place. But there was an even bigger problem.
Civilization as a whole regressed.
From 3020 to 2020.
All of the advanced beings in the world disappeared and humanity regressed.
The geniuses who said they were long-lived gathered together and tried to figure out the cause with their heads together, but no one could find any clues.
Humanity started to recover the weapons to use against the monsters as quickly as possible.