Machina of the Planet Tree -Planet Ruler-

In "Machina of the Planet Tree -Planet Ruler-", the Esthanatelle Order maintains control of the world with the help of the Planet Tree's energy. After the excavation of relics from the "Old World", known as "Attributes", the Halbern Machinery Academy is established for research. When the Academy gains independence and begins to govern a large part of the world, the story follows Cram trained as an S-Rank Mechanician, uncovering the secrets of this world.