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.

Cocytus gives a declaration of war to all the tribes of the Lizardmen, expecting an easy takeover. However, the Lizardmen decide to try to unite their tribes against their common foe.

Zenberu tests Zaryusu’s strength in combat, while the latter defends Crusch’s honor. The Lizardmen chiefs conduct a war council, and formulate a strategy to defend themselves against their common enemy.

Officers of the Slane Theocracy gather to discuss recent losses. The noblemen of Estize plot to push back the Empire. Ains surveys a world map as his plans are set in motion. Shalltear recovers from her ordeal.

Sebas happens upon a near-lifeless woman, and takes her under his protection. Brain, left defeated by his encounter with Shalltear, meets up with Gazef. Members of the Blue Rose take measures against a drug plantation

Climb delivers Lakyus’ message to Evileye and Gagaran, who offer guidance to the young man. Climb happens upon some men beating up a boy in the street, who is then rescued by Sebas, from whom he seeks training.

As Nazarick decides on their next steps, the village of Carne focuses on rebuilding their homes. Enri and her goblin troop are busy protecting the villagers, training the vigilante troop, and manning the fields. All the while, unrest builds in the forest.

The Tomb of Nazarick continues their plan for world domination and Ains visits the Baharuth Empire as Momon of Darkness. Meanwhile, Count Femel hires a large number of Workers to explore a certain tomb recently discovered in Re-Estize Kingdom.

The alliance of the Lizard men win the battle and defeat the army of undead. The defeat guardian Cocytus and the new ability to learn from their mistakes, prove that the guardians can adapt to new situations. Ainz Ooal Gown therefore changes his tactics, ordering Cocytus to bring the Lizard men to their knees and under the rule of the Great Tomb of Nazarick.

Gazef finds Climb practicing with his sword outside the castle, and asks to spar with him. Renner and Lakyus examine the coded document recovered by Evileye. Sebas finds himself beset upon from all sides over Tuare.

Re-Estize Kingdom prepares for war after receiving a declaration from the Empire that they will claim the land near E-Rantel for the Sorcerer King Gown. Gazef knows the magic caster’s strength, but he cannot stop what has already been set into motion.

Sebas begins his raid of the brothel from one side, while Climb and Brain enter from the other side. While Climb covers the exit alone, he is confronted by Succulent and Cocco Doll trying to flee and a desperate fight begins.

At the outpost in the Tob Forest, Ains strategizes with his guardians, and imposes Shalltear’s penance upon her. The Lizard Man chiefs assemble and receive Cocytus on the battlefield for their final showdown.

The "Giant of the East" has come to attack Carne Village, but the villagers are willing to put their lives on the line to protect their home and families. While the goblin troop defends the front gates, Enri and Nphirea defends the village from behind.

As Ains muddles his way through ruling his new kingdom, he continues to ponder over a particularly important question. Everyone in his kingdom and the Tomb of Nazarick is also waiting for his answer. What kind of kingdom does he wish to create?

Momonga sets out with Narberal disguised as humans under the names of Momon and Nabe for the city of E-Rantel. There they register to become adventurers in order to gain more information about this unknown world. As they do, evil gathers around them.

Momonga and his group continue to Carne Village. There they see that the villagers are working toward fortifying their defenses against possible future enemies. Nphirea meets up with Enri and asks her about this man named Ains Ooal Gown.

Momonga finds out that Shalltear has revolted against him, due to something that had happened while she was on her mission with Sebas and Solution. The story rewinds a bit and goes over that very event. What could possibly change her loyalty to him?

Ains calls on Sebas to answer for his actions, and to discuss what is to become of Tuare. Renner meets with the Blue Rose, then Marquis Raeven, to consult with them about her planned attacks against Eight Fingers.

Carne Village is in a pinch once again. An army led by the first prince of Re-Estize has appeared, demanding to be let in so the villagers can be questioned about Ains Ooal Gown. Enri must make a decision for the village and its people.

Gazef challenges Ains to a duel that is impossible to win and Ains decides to accept. The battle will soon come to an end and the fate of E-Rantel will be decided. Even amongst the bloodshed, Gazef and Ains both hold the other in deep respect.

The major powers in other countries grow increasingly wary about the Sorcerer Kingdom. Especially the emperor of the Barahuth Empire, who might go bald from the stress induced by the overwhelming power of Ains Ooal Gown. On which side will he stand?

Grateful that they weren’t cast aside, the floor guardians experience the rule of their true master for the first time. Momonga quickly assess the situation and works toward protecting the tomb from invaders while contemplating what he must do.

The foolish workers that have entered the Tomb of Nazarick greatly anger Ains Ooal Gown. Albedo and the others have already finished preparations for their welcome and Lord Ains watches on, determined that not a single one leaves his tomb alive.

Albedo personally makes her way to Re-Estize Kingdom as an envoy of the Sorcerer Kingdom. Meanwhile, the people of Re-Estize continue to do what they can to recover from the recent war and prepare for the future. Though not everyone has peace in mind.