A genetic disaster called the "Blighting Plague" selectively destroyed the vast majority of males with Y chromosomes, resulting in a serious imbalance in the male to female ratio (approximately 1:80). In order to perpetuate the race and make use of the special abilities of the remaining men to build the "Soul Sutra" (a kind of spiritual energy skeleton), women provide "Soul Weft" (diverse elemental energy flows) to combine with it to form a powerful "Soul Weave" power system. The federal government implements the "Genealogy Command" system, forcing males of the right age to conduct matching evaluations to find the most efficient Soul Weave combination. The power of soul weaving is the foundation for this world to fight against the "aberrant bodies" left over from disasters and to maintain social order.
