Long ago, two opposing groups, the elementals, and the physicals, once coexisted peacefully. However, discovering a legendary cursed sword, the Katsuki ninjato, by an elemental named Haruki shatters that peace. Haruki, a cryo elemental, found the sword known for possessing its wielder with dangerous instincts. He made a critical mistake by revealing the sword to the physicals, which triggered a massive war between the two factions. Now, in the year 2105, the war continues. Both the elementals and the physicals are divided into specific categories, each with their unique abilities and roles.
