In the game, you are tasked as a Special Duty Librarian (特務司書), otherwise known as The Alchemist (アルケミスト).

You are tasked to delve into tainted books and purify them with parties composed of writers (文豪, lit.

To obtain these writers, you are also tasked to delve into ensouled books in order to transmigrate and recruit them into your library.

Taniguchi also expressing that he would like to explore how some of the writers would interact with one another by mirroring how they felt about one another in real-life.

[4] Blades - Representing writers who mainly had written novels and short stories.