On what seemed like any other day, rifts appeared in the sky and changed everything. Monsters poured down on the cities and villages from above, destroying and incinerating everything in sight.
The people were victorious by uniting and fighting back but suffered severe casualties. Since then, the monsters that appeared from the rifts were called "Kaos," and the incident was known as the "Fractured Night." Ever since then, the Kaos have been feared by all.