In the past, the seven of the Archdemons reached their peak—it was seen that they managed to achieve the next evolution.
The seven of the Archdemons is the real ruler of the world of hell; they can be said to be the strongest in their world.
The seven of the Archdemons wanted to create a border of the world of Demon Realm, but they did not expect it to show the pressure.
The seven of the Archdemons knows they can't destroy the rules of the world of hell itself, and since that day, they have decided to sink into their sleep.
The seventh of the Archdemons hid in the world far from living things; it can be said to be the world of creatures without their physical form.
The seventh of the Archdemons are the devils who achieve the evolution of Overlord Demon; they can be said to be the strongest.
The Red Devil, Lucifer, is the only devil from the Archdemon generation who reaches the human world.
