The souls in the upper world are immortal, but they cannot escape the tragic consequences of being entangled by the soul. The mortals in the lower world live and work in peace and contentment, but they cannot escape the limitations of life and death. The desire for immortality and peace has given rise to evil thoughts in human beings. From then on, the blood was born.
Concept: The connotation of life and death, the boundary between love and hate
