Inside a mysterious Academy hidden away from the human world, students are separated into two categories: Arms and Users. Arms possess the ability to transform into living weapons. Users are trained to wield them. Before the Ceremony of Appartenance, the two are forbidden from meeting. A failed bond between incompatible partners can lead to instant death. As the Ceremony approaches, friendships begin to fracture, forbidden connections are formed, and strange secrets surrounding the Academy slowly begin to surface. Beyond the Academy walls, terrifying creatures known as Aberrants continue threatening the balance of the world.