Ike battles the treacherous Basteo and his undead legions.

Rimuru and the children reach the deepest level of the Dwelling of Spirits, where they stand on a pedestal bathed in light to summon superior spirits. Will their summoning be successful? Amidst the uncertainty, the first to attempt the summoning is Gale, followed by Alice, Kenya, Ryota, and finally Chloe. But instead of a spirit, Chloe's summoning brings forth an unknown spiritual form with an immense amount of energy. Just what is this spiritual being? Ramiris seems to sense something about it...

Rimuru and the children reach the deepest level of the Dwelling of Spirits, where they stand on a pedestal bathed in light to summon superior spirits. Will their summoning be successful? Amidst the uncertainty, the first to attempt the summoning is Gale, followed by Alice, Kenya, Ryota, and finally Chloe. But instead of a spirit, Chloe's summoning brings forth an unknown spiritual form with an immense amount of energy. Just what is this spiritual being? Ramiris seems to sense something about it...

After the confrontation with Shinozaki, Omi and Kazuhiko were separated from the rest of the group. While fleeing from their pursuer, they encounter a boy who has the means to reunite the students.

Akihabara is amazingly busy since the Scales Festival began. There are many land people in town, causing accidents, spreading rumors, and starting couples' fights, and even Shiroe can't deal with them. An influential noble named Marves arrives from Minami to see Laynessia. Laynessia tries her best to deal with him, but he gets closer and closer to her...

Osamu Kirin has been quietly exterminating the demons that have been appearing in the present day. He asks Towa, Setsuna, and Moroha to slay demons at the concert that is happening.

Sensei, Annette, and Tama move on to the next city. Along the way, they meet a girl who can speak with dragons and harbors a great grudge against world-changers.

Mira has to justify to his subjects and comrades why the ground invasion has stalled. His colleagues then advise him to blow off some steam. However, he couldn't have known who he would meet at the establishment his colleague suggested...

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"...

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...

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

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.

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...

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.

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.

Only fifteen minutes and thirty seconds until moonrise!

They're here! They're here! A whole swarm of moths!

Isaac and the Black Sword Knights are responsible for training the Maihama army. While he's in Maihama Isaac gets to know the new crown prince of Maihama, a young boy named Iselus. Iselus respect looks up to Isaac and respects him. At a party for the crown prince's birthday, assassin's make an attempt on his life.

Shiroe receives a letter from his second character on the lunar test server. As the situation in Akihabara deteriorates, it offers him hope.

Operation "Red Night" is canceled and the kids come home to a joyous reunion. They've gotten their magic bags and succeeded in their quest. But a strange man is going around Akihabara asking all the girls to marry him.