"AntiMagic Academy 'The 35th Test Platoon'" is set in a world where magic has become a destructive force, leading to the rise of witches who threaten humanity. To combat this, the Anti-Magic Academy trains students to become Inquisitors, specialized warriors equipped to fight magical threats. The story centers on Takeru Kusanagi, a former elite swordsman who is demoted to the 35th Test Platoon, a group of misfits considered the weakest in the academy. This platoon, also known as the "Small Fry Platoon," is tasked with handling low-priority missions, but Takeru's arrival begins to change their trajectory.

The 35th Test Platoon consists of several key members: Ouka Ootori, a hot-headed and determined leader with a tragic past tied to witches; Usagi Saionji, a skilled sniper with a calm demeanor; Ikaruga Suginami, a tech-savvy engineer who provides tactical support; and Mari Nikaido, a cheerful and resourceful medic. Together, they navigate their underdog status while uncovering deeper conspiracies within the academy and the broader conflict between humans and witches.

As the series progresses, the platoon is drawn into increasingly dangerous missions, revealing hidden truths about the nature of witches and the academy's true intentions. Takeru's unique abilities, including his use of a cursed sword that grants immense power at a cost, become pivotal in their battles. The narrative explores themes of prejudice, loyalty, and the moral complexities of war, as the characters grapple with their roles in a world where the line between good and evil is often blurred. The series balances action, character development, and world-building, culminating in a climactic confrontation that challenges the platoon's resolve and unity.