To put it simply, it is the story of a [human] who was too good at middle school, was bullied by an [alien], and then was talked about life by an [unnamed being].
To put it more complicatedly, it is:
In the 21st century, mankind has avoided the doomsday prophecy of 2012.12.21, But a disaster called alien has struck mankind. All observable animals have disappeared, and plants have mutated on a large scale. The living space of human beings has become narrow in the vast world. However, humans discovered that they were able to use special abilities.
At the beginning of the 22nd century, the surviving humans built high walls to protect themselves. Everything seems to symbolize a new beginning.
In the wilderness, they struggled to attack the high wall.
Inside the high wall, they looked at the sky outside the high wall.
Hidden away, they and they choose to watch from a distance.
Elsewhere, they and they choose to survive as best they can.
As for what will happen on December 21, 2112, which has been omitted from historical inheritance, that has nothing to do with our story yet.
The story of the boys and girls has just begun.
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The writing style is confusing and the plot may not be very ups and downs. The most important thing is that the update is extremely slow. If you don't mind this, you can read on.