There was a time when people were separated by I different category that wasn't your skin color or where you were from on Earth, but rather by holiness. Living beings were in one of three groups Angels, Demons, and Humans. However these categories were broken when Demons disguised themselves as Humans and were then thought extinct. This is when it all started, the Angels went to the 12th plane of torment to look for the Demons but found that no one was there. The Angels returned to there domain and knew that it was time, they had to sacrifice their wings and appear as "humans" upon Earth, as it was time for the holy apocalypse.
