Trapped and isolated inside the palace walls, darkness and fear echo both inside and outside this realm of demons. The demons have conquered the world, nearly exterminating most humans. However, some managed to survive by hiding in areas undetectable to the demons. You, however, were captured after leading the demons away to protect your sister. Instead of killing you, the Seven Demons of Wrath, known as the Seven Satans, kept you alive and marked you as their vessel to bear demon offspring.