This is an era of chaos
Since the demon war seven hundred years ago
The demon clan's vitality was severely damaged and they have withdrawn from the human stage.
But there are various forces that dominate one side, waiting for opportunities to appear.
It's calm on the surface, but it's turbulent secretly
The war is about to break out
Our story begins here
A building that brings together guys with different experiences
What will it develop into, and what is their purpose?