The sibling chapter of "Black Machine Fantasy". The development of the steam civilization brought a barbaric increase in the level of science and technology to the world, and at the same time brought about the old world war. After the war, the Western coalition unified government and established a new order. In the midst of a seemingly stable society, the aristocratic urban agglomeration of Charlos is in turmoil. Organ curse case, the rumored organs involved in the case are all cursed, it ...... They will brutally kill everyone around them. Raven Street, a rumored abandoned street full of crows and various forbidden experiments. Perpetual motion machine, the rumored self-propelled mechanism puppet Ae Bo gave a black gold mechanism called the Black Gear to those who encountered it, and this black gear is part of the ...... of the perpetual motion machine In this complicated situation, Austin, a member of the Western Union Gendarmerie Law Enforcement Team, codenamed Falcon, came to Charlouse, and was involved in the incident with Lindsey Wilkins, a graduate of the Grand Rank Institution Academy.