Human World

The Human World is a realm that coexists with Demon World where other non-Grace Field House related humans are currently residing at.

In Chapter 173, Peter told Emma that the things that the demons were doing to them are the same to what humans are doing to each other for a very long time, even though humans don't eat humans.

After entering the door, the Grace Field and non-Grace Field children were teleported on Area 01, the former United States of America.

It is revealed in Chapter 179 that between 2020 and 2030, the human world was ravaged by disease, epidemics, food shortages, abnormal weather conditions and world war. In an effort of reconstruction, all national borders were abolished, making one huge nation.

The current Head of the Ratri Clan for the Human World is Mike Ratri.

Children and other humans from the farms wish to go to the human world in order to live at peace without demons.