The Warring States era has continued for 100 years. Fugo and Roca are childhood friends from the Kingdom of Asdormu. They were once separated due to their country's intentions, but several years later, fate brings them together again. Meanwhile, as the two desperately try to survive in this war-torn world, a new, unprecedented threat attacks them! The Great War of the Five Nations begins, as geniuses reincarnated into a war-torn alternate world use their utmost intelligence to repeatedly attack and defend!