Loic Descent: Prologue is the first story in the M-Series. It documents how the Supernatural System was created. Three spirits, Ir, Mer and Ac, from a distant planet namd Loic, decided to incarnate to Earth and establish the Supernatural System, together with the Three Goddesses from Ofpsic, that they had built while still on their home planet.
After the story, Ir incarnated in the Aztec era as a rebel leader named Icnoytl. Mer incarnated later on in ancient Middle East as a woman/prostitute named Hamid Atika, and Ac incarnated much later as one of Harry Houdini's assistants. The Three Goddesses incarnated in Ancient Japan.