English (dubbed) title : Satan's Spawn.
Gehenna Gate - A demon that can be created when Satan appears in the material world (Assiah). Has the ability to go back and forth between Assiah and Gehenna.
Coal Tar - Demons who possess fungi and are airborne. Associated with rotting. Though they are at the bottom of the demon food chain, they also far outnumber any other species, and become an instant threat once they band together as one.
This story is not part of Kazue Katô's manga. The story was written by screenwriter Ryôta Yamaguchi.