The ancient god slumbers in regret and sadness, but all things must once awaken and so do gods as well.

Ulbert Alain Odle decides to visit his favored game during its last day. During the final seconds before the shutdown, he makes a wish, if only he were Ulbert Alain Odle... for real. And now, having finally received the gift of his life time, the Demon God of Calamity shall rise once more, but this time in a whole new realm, and as a whole new person.

The Dragon emperor used the spell? Ainz is the first player to arrive in the New World? Let's see what happens, shall we!

Instead of summoning Diablo, Rem and Shera summoned something... far more powerful... a being that rivals Gods themselves, someone who controls both life and death of all mortals. Yes, that is him the Supreme Overlord of the Great Underground Tomb of Nazarick - Ainz Ooal Gown!