Legend has it that since the death of the God of Heaven, the world has been in chaos, with demons and ghosts running rampant, and the people living in dire straits. At this critical moment, twelve young men appeared as "agents of God" to save the world from fire and water. They named the world [Heaven and Earth] and divided it into twelve regions. Each region was guarded by an agent, and people called them [Twelve Leaders]. Under their leadership, the world returned to its former peace.
A hundred years later, the young man "Youchen" heard the legend and embarked on a journey to "heaven and earth" to lift the curse...
(Part of the settings are borrowed from the black beast settings of Border Bus, please comment if you don't like it)
