Momonga is a regular salaryman who leads a guild in an DMMO-RPG known as Yggdrasil. After twelve years of playing the game, the servers are finally shutting down. Momonga logs in for the last time, seeing the game to its end. However, after the clock strikes midnight, nothing changes.

Momonga reminds Shalltear that he is the master of Nazarick and that his name carries the weight of all the supreme beings of Ains Ooal Gown. After the battle comes to a close, Momonga quickly takes action to strengthen the defenses of Nazarick.