There once was an era in which the earth was inhabited by gods, humans, and an evil deity from the underworld known as the Demon God. At the end of the long battle, monster suppression was achieved by means of the Sealbook invented by the first royal alchemist Siegdrad, and even the Demon God was buried to the underworld. Vitoria, the First Queen of the Kingdom of Romulea, achieved continental unification through the hard work of mankind, and the world was restored by the hands of humanity. 500 years later—.
The stage is the Royal Library of the Kingdom of Romulea. The Demon God said to have been buried in the underworld… was alive! The Demon God sealed in this world was in an imperfect state and revived. Led by Fried Einhard, one of the superior Libras, the Royal Library of the Kingdom of Romulea battle party was formed, and set out for what would this time be a perfect seal of the Demon God.
In the depths of the Royal Library of the Kingdom of Romulea—. The gate to the underworld opened, and after clearing through its mysterious dungeons of the underworld, the last battle between Fried and the Demon God finally began. However!! Fried and company fell before the formidable Demon God—. And so, “The Kingdom of Romulea… fell into darkness.”