Reapers vs Demons
When he saves the Death king's daughter from a yellow-eyed assassin, apprentice Reaper Xavier Devouh is thrown from a cliff and vanishes into the depths of the Ocean realm. His body, which may still be able to house life, is lost for years, while his soul remains trapped inside his twin.
Once the co-existing brothers surface in secret from Grim's underground caverns to find Xavier's missing mortal vessel, they find, in their absence, an ancient queen and her horde of demons have invaded. The Reapers find themselves unprepared and horrifically outnumbered in a foreign land that they are now unwelcome in.
One thing has not changed, they are Reapers!