In the 13th Hierarchical City, Kagutsuchi, the Librarium regulates the amazing power of "Armagus", a fusion of magic and technology.

They are currently on the trail of a dangerous wanted man named Ragna The Bloodedge, who wants to destroy the Librarium.



Characteristics:

- Due to Ragna possessing a powerful form of Armagus known as Grimoire Azure,



- People from all over the world follow him not only for the reward but also for the grimoire, this is where our story begins.