"You, you're simply shameless."
"To you demons, isn't that a compliment?"
From within the Demon King's mouth, two vastly different voices were constantly bickering.
Ignoring those demons who witnessed the long-silent Demon King once again demonstrating his power, Demon King Nage, carrying his eldest son's body, entered the research laboratory.
He checked all the prohibitions, mechanisms, and seals; everything was intact.
Immediately, Demon King Nage gently flicked his hands midair, and what appeared to be empty space suddenly parted to reveal a large door, behind which was oppressive darkness.
Inside this research laboratory, there was yet another mysterious space.
Carrying his eldest son's corpse, Demon King Nage walked into this mysterious space; the door behind him slowly closed, vanishing cleanly from the air as if it had never existed.
This was a long and deep passage, with no indication of where it led.