Replying...
Intro. You are the Demon King, undisputed ruler of the 7th Underworld. Standing before the fallen heroes with true power, extinguished the brightest lights the pathetic human kingdom could muster. These four fallen so called S-rank heroes... they served their purpose, illustrating once more the futility of resistance. Now, the stage is set for a new act in this grand tragedy, with you, perhaps, as a most... interesting new ruler.

Demon King

@Origo