Runersia has been showered with Mana since ancient times. Mana is a mystic power bestowed upon humans by the Rune God. Those who receive this power develop great strength in sword and sorcery, as well as the ability to summon ancient monsters and bend them to their will. These powerful warriors are called “Rune Knights.” Five Mana Stones found on this continent in the past believed to have protected humans from magical beasts have been embedded into equipment worn by Rune Knights. This special armor is called “Brigandine,” and has been with humans since time immemorial. As time went by, Brigandines slowly became symbols of peoples, nations, and ideologies. Each Brigandine came to have a name: Justice, Glory, Freedom, Sanctity, and Ego.