It's almost Christmas in Akihabara. At Lenessia's mansion, Marie and Henriette are all visiting. Lenessia is smiling, but she can't open herself up to the adventurers because of how different they are. Akatsuki, who has been tasked with guarding the princess, is the only one who isn't having fun. She thinks of Shiroe and worries about her own powerlessness. Then, in Akihabara in December, a shocking event occurs.

A man appears in Akihabara and begins killing adventurers with powerful Royal Guard equipment. Lenessia is shocked to learn that he is one of the Land people, of the Kunie clan. Akatsuki goes to put a stop to him herself, as the West Wind Brigade scouts find him...

Akatsuki revives at the Cathedral and asks the others for help to defeated the murderer. She trains with the top members of D.D.D. and the West Wind Brigade in an attempt to learn the Teachings.

A full raid of 24 party members has been formed to defeat Nerelith! The maidens gather to defend Akihabara! Meanwhile, Lenessia and Henrietta head beneath the Guild Building for a certain mission...

On Christmas Eve, Shiroe and the other members are fighting the level 97 boss monster "Luseat of the Seventh Garden." But two more boss monsters appear in the middle of the battle, and they are overwhelmed. Shiroe is caught in the fires of "Ibrahabra of the Third Garden"...

William, the leader of the combat guild Silver Sword, faces a great crisis as his guild has been defeated and is thinking of going home and quitting. He gives an inspiring speech to rally them into the fight once more.

With honesty and renewed sense of comradery the team has a small chance of winning an unbeatable raid.

To make the city of Akihabara safe, Shiroe calls all the major guild masters to the guild building. His goal is to create a Round Table Conference, which will rule the city. But everyone there wants something different, and his plan is about to go bad. What amazing trick does Shiroe have? Meanwhile, behind the scenes of the conference, the plan to free the younger players from the evil guild Hamelin continues. The strategist SHiroe's quiet battle in Akihabara continues!

Shiroe confronts the 10 guild masters who represent Akihabara with the need to revitalize the town and bring peace and order. His calm and forceful manner brings them over, and the government of Akihabara, the "Round Table", is founded. After this work is done, his guild, "Log Horizon", joyously moves to their new location. That night, Nyanta fixes them his special curry.

Touya and Minori and the rest of the players in the training camp are hitting a wall with the way they fight. And Minori's suggestion is that they introduce themselves to one another!

Just as the Sahaugin attack begins on the Zantleaf peninsula, the goblins are seen advancing further inland. Will they attack Laynessia's homeland, Maihama, or Akihabari?

The lords of the Free Cities of Eastal begin an emergency conference to discuss the goblin invasion. The protectors of the land people, the Izumo Knights, are missing, and they'll have to depend on the adventurers.

Princess Laynessia Cowen vows to go to the city of Akihabara herself and beg the adventurers for help against the goblins. The members of the Crescent Moon Alliance can't conceal their excitement at meeting a real princess.

Zantleaf is attacked by monsters from both the land and the sea, as the adventurers continue to defend it. Inland, Crusty's army launches a raid on the goblin's main force. At the town of Choushi by the sea, the new players are fighting too.

Rundelhaus hid from his friends that he was one of the land people, but the price of fighting off the dire wolves was that he took a fatal wound. If they can't save him, he'll die and he won't revive.

A victory party is held at the palace of Eternal Ice to celebrate the adventurer's defeat over the monsters. Crusty takes the princess's hand and leads her in a dance signifying the reconciliation between the adventurers and land people.

Fall has come to Akihabara. After defeating the monsters, Shiroe is fighting a losing battle against paperwork, but the town is filled with cheer as the first event the Adventurers have ever had, the "Scales Festival", is approaching.

The second day of the Scales Festival in Akihabara arrives. Akatsuki has gotten closer to Shiroe, and so is very happy all day, and even seems to be enjoying her fights with Naotsugu. Meanwhile, Minori is uncertain with how to deal with her feelings towards him, and goes to speed to Karashin. Karashin is overloaded with paperwork so she decides to help. It seems like a lot of land people merchants have come to Akihabara...

Marielle and Henrietta put on a fashion show as the town reels from the Minami decoy operation. Akatsuki walks down the runway in her colorful clothes, but Shiroe is nowhere to be seen. That night, Shiroe is met by a beautiful and enchanting "queen of darkness." Shiroe is tempted he reaches the heart of the conspiracy...

It's been six months since Shiroe and the other adventurers have been trapped in "Elder Tale". As Akihabara moves into late fall, the city is excited for the cultural fair. But Shiroe is ignoring the fun and speaking in secret to a land person, Kinjou, who controls the world's currency flows. When negotiations are over he tells his friend's leaving the city. The long-awaited second series of "Log Horizon" begins a new adventure!

Shiroe, Naotsugu, and Regan head to the northern city of Susukino, which was once run by the evil and violent Briganitia guild. They're looking for high-level adventurer's to help them get the the "Sacrifice Clan's Gold". Shiroe visits an unexpected person. Meanwhile, Naotsugu and Regan walk through the frozen town and find a small but pretty girl named Tetra. She calls herself a "galactic idol", and she's very irritating, but her level is 92...!?

Shiroe and his friends have come to the Depths of Palm to reach the Sacrifice Clan's gold. The underground labyrinth is filled with powerful monsters that wear them down in a war of attrition. Meanwhile, Akihabara, Akatsuki hears about the "Teachings". She's very interested to know that by completing a high level raid, she can greatly improve the level of her techniques.

Akatsuki is defeated by the murderer on Christmas Eve. She awakens to find herself in bustling Shibuya station in the real world. She wanders through the city as if escaping from something, and then appears on a quiet beach. Shiroe is there.

The final boss, Uru of the Ninth Garden vs the villain in glasses, Shiroe is up against what could be the strongest boss in this new world.

Shiroe, Naotsugu, and Akatsuki reach the northern city of Susukino, and safely meet Serara. With the help of the mysterious swashbuckler Nyanta, they plot to leave Susukino. But the evil guild Brigantia wants to stop them. The high-level monk Demikas attacks them. Can they overcome the odds?