A Supreme Being cannot be killed or defeated and even when stopped. It may come back for revenge. And so, the consciousness of the universe, God should have never attacked someone with the ability to destroy it all. A new era is about to begin, and while slowly gathering the strength to pay the debt. The Leader of Ainz Ooal Gown, will bring the world to its knees.

YGGDRASIL. A DMMORPG that lasted for twelve years as the ranking virtual reality game. But finally, after their long run, YGGDRASIL's final hour has arrived. One angel remains in the skies to live these final moments, only to find himself in an unforeseen predicament.

I got this idea when watching Overlord season 3 and Ainz Ool Gown terrifying power unleashes. What would happen if Britania faces such a monster?

(Harem! Lelouch-Momonga/CC/Kallen-Albedo/Milly-Shalltear and more!) When Yggdrasil shut down, Momonga and the NPCs were not sent to the New World, but reborn in another world. Momonga, once Satoru Suzuki, slumbered within the mind of Lelouch vi Britannia...until CC, in unlocking the power of Geass, unlocked memories and powers that will ensure Ainz Ooal Gown's resurrection...