"Bungo and Alchemist -Gears of Judgement-" is an anime adaptation of the mobile game "Bungo to Alchemist," blending historical literary figures with a supernatural narrative. The story is set in a world where famous authors, reincarnated as literary spirits, are tasked with protecting the purity of their works from corruption by malevolent entities known as Taints. These Taints distort the original texts, threatening the legacy of literature itself. The protagonists, including authors like Osamu Dazai, Ryūnosuke Akutagawa, and Atsushi Nakajima, are summoned to the Library, a sanctuary where they are trained and deployed to combat these threats.

The central conflict revolves around the Alchemists, individuals who guide and support the literary spirits in their battles. The Alchemists use a device called the Gear of Judgment to purify corrupted works and restore them to their original state. The series explores the dynamics between the authors, their relationships, and their struggles with their own identities and legacies. As the story progresses, the characters confront not only external threats but also internal conflicts, such as their personal regrets, insecurities, and the weight of their literary contributions.

The narrative delves into the historical and cultural significance of the authors' works, often drawing parallels between their real-life struggles and the challenges they face in the series. The battles against the Taints serve as metaphors for the preservation of artistic integrity and the enduring impact of literature. The anime balances action sequences with introspective moments, offering a mix of supernatural combat and character-driven drama. Through its unique premise, "Bungo and Alchemist -Gears of Judgement-" pays homage to the literary giants it portrays while crafting a story that intertwines their legacies with a fantastical, otherworldly conflict.