Fall

==Summary==
During the Rise event, which was caused by M and his discoveries, the world was shattered into two. The Fall and the Rise were made. The Fall is what is left of the Earth that wasn't part of the Rise, and purple gas was everywhere with monsters lurking in every corner. People have been warned that "Once you enter The Fall, you can never go back". After this event, everyone has been wondering... Why did M do this? The scientist that was seen as a genius in everyone's eyes just decided to shatter the world...