The world we know, and experience consciously. Earth is the same as you might know it, except for the addition of a city called Amtrecht – the place where Nergui and her family & friends live.
Currently, the world is being swept off its feet by a mysterious pandemic, which is putting people in a coma they can’t seem to get out of.
The disease seems to be contagious in some way, because people who have some relation to each other often get infected very quickly after another. However, it’s been popping up in different parts of the world at the same time, so there doesn’t seem to be one source of the coma.
Because the victims are stuck in a constant REM sleep, as evidenced by their constantly moving eyes, the disease is called Sleeping Beauty Disease, or SBD for short.