I traveled through hundreds of worlds at once

The morning sun dispelled the darkness. A huge rectangular stone monument with a height of 1.618 kilometers and a width of 1 kilometer stood quietly on the earth like an iron tower that reached the sky and reflected a deep blue luster under the morning sun.

The countless black stone monuments were separated by a certain distance, forming a huge fence that enclosed a city as the last paradise for humans in this world.

The dividing line between the human and protostomes divided by the stone monument has existed for nine years in a blink of an eye.

The areas in Tokyo that were able to be preserved intact during these nine years were unified.