The inhabitants of Paradise made a wish that they can't take back. Mankind has lost the power they once had. Even the heroic warriors and fantastical archmages have lost their status. Although the previous five demon lord were conquered without much problems, things are different. The apocalypse has begun and the reign of the Demon Prince of Undeath has begun.

This story is part of the River of Falling Snow (ROFS) universe created by me, 2Degenerate.

The story begins in an isolated system, World of Paradise, in the year 666 of the standard calendar.