One day in the future, alien civilization will arrive.
Aliens have evolved a technological civilization that far exceeds that of humans. They abandoned their bodies, leaving only their ideology and their bodies energized.
In order to resist aliens, humans have no choice but to abandon all high-tech things, such as mobile phones, computers, televisions, radios... Because these can be manipulated by aliens and turned into terrifying weapons.
The remaining human beings gather in various nature reserves and survive, but in fact they are kept in captivity, just like when humans set up wild animal reserves.
It was under such circumstances that the male protagonist traveled here.
