This is a story about reviving hopes, set in the high-growth period of a fictive country that looks just like Japan. This period is called "Taisho".Thanks to high growth, technology developed itself rapidly and resources like coal or electricity have been replaced by a new resource called "Guiding ore". This Guidance stone can supply anything. Likewise, it can be used to create a "Guiding katana", a special type of blade that can be held by anybody in possession of a special seal.