The soul race is a race with powerful power that constantly strengthens itself by constantly devouring other souls, while the spirit race is a race that has the ability to perfectly control souls. In the upper spirit world, the two races have been intermarriage and friendship for generations. Although there have been some disharmonious episodes in history, the two races have always had the same goal, which is to constantly make themselves stronger, to jointly protect the peace and beauty of the upper spirit world, and to scare away the alien races that have been coveting this place...