According to ancient myths, it is said that the entire world and all species were created by the "Cube of Gaia." The Cube of Gaia brought forth the celestial realm where angels reside, the infernal realm inhabited by demons, and the mortal realm bound by the chains of time.
These three realms are collectively known as the "Divine Realm." Although they are not inherently connected, fluctuations in the energy emitted by the "Cube of Gaia" occasionally create narrow passages between them. Angels and demons who traverse these passages to enter the mortal realm become subject to its chains of time, aging and withering just like the species of the mortal realm.
It is said that myths, legends, and even magical techniques passed down in the mortal realm originated from angels' guidance. Consequently, a religious sect devoted to worshiping the Cube of Gaia and angels was born among humans. They established the most beautiful city on the continent —Navea— to continue spreading these ancient legends.
