Her Majesty's Swarm Novel Volume 1 was written by 616th Special Information Battalion and illustrated by Eiri Iwamoto.

Our protagonist is a college student who enjoys playing as the evil-aligned faction Arachnea in her favorite real-time strategy game. One day, she finds herself in a world similar to the one in the game; additionally, her body is now that of a fourteen-year-old girl. While things are a bit different from how they were in the game, one element has remained the same: she is the leader of the Arachnea. The insects under her control, collectively known as the Swarm, praise her and implore her to lead them to victory.

In order to survive, she raises her Swarm and forms friendly relations with the elves of the neighboring forest. But after a slaver traveling through the forest murders one of her Swarm and the nearby kingdom's knights burn down the elven village and massacre its people, she prepares to launch her counterattacks in the name of revenge.

However, revenge is merely a pretense for attacking the countries of this world. Her command is masterful and severe, as one who has played the game in real life…

Her Majesty's Swarm Novel Volume 3 was written by 616th Special Information Battalion and illustrated by Eiri Iwamoto.

Grevillea, Queen of the Arachnea, has decimated both the Kingdom of Maluk and now the Dukedom of Schtraut one after the other. When she investigates reports of raids on her new territory, she discovers the raiders are pirates from a colony on the island of Atlantica. Grevillea conspires with their captain, Isabelle, and aims to use her newfound partnership to plunge the Popedom of Frantz into the depths of despair…

Her Majesty's Swarm Novel Volume 2 was written by 616th Special Information Battalion and illustrated by Eiri Iwamoto.

After a swift campaign, Grevillea and the Arachnea manage to conquer the Kingdom of Maluk, the great power of the north. Now, they prepare for the next war. Their eyes are on the Dukedom of Schtraut, a country of merchants northeast of their territory. Conquering it will provide a shortcut to subjugating the other nations.

Accompanied by an elite squad of her strongest units, Grevillea sneaks into the Dukedom, where she hopes to gather information on the country’s topography, defenses, and culture. Her group establishes itself as members of the local Adventurers’ Guild and begin hunting monsters to complete the guild’s quests. While the group works to form connections, Grevillea secretly prepares to bare the Arachnea’s fangs against the Dukedom...