The world Star King Dragon Veldanava created was supposed to get a small unassuming slime with great potential. However, fate seems to be whimsical sometimes and gave the unprepared world a vast dungeon full of beings, both wondrous and terrible. Nazarick, knowingly or not, is bound to reshape the very foundations of the world.

DMM-RPG Yggdrasil was ending. Guild-master Momonga organizes one last get-together before servers shut down. Most of the old guild members didn't bother to respond, but some showed up in the last few days. One of them, Tabula Smaragdina, acted weirder than usual, wanting to change his creations and acting like something big was coming.