Orience is carved into four sovereign nations, each wielding dominion over elemental forces channeled through ancient crystals that define their power and identity. The Dominion of Rubrum draws strength from the Vermillion Bird Crystal and maintains a military academy where the brightest cadets are groomed into formidable soldiers—none more decorated than Class Zero, an exceptional unit of student fighters. When the technologically superior Milites Empire strikes with overwhelming force, they deploy a weapon designed to neutralize magic itself, crippling Rubrum's ability to defend against the onslaught. Class Zero alone remains unaffected by this suppression, thrusting the young elite squad into active combat as the continent's last viable resistance. As regional tensions spiral into full-scale war, these cadets find themselves swept into a catastrophic conflict that will reshape the future of every nation in Orience.