This is a story of hope rekindling, set during a period of high growth in a fictional country that looks just like Japan. This period is called the "Taisho". Due to the high growth, technology developed rapidly, and resources such as coal or electricity were replaced by a new resource called "Guiding ore". This guiding stone can provide anything. It can also be used to create the "Guiding Katana", a special type of blade that can be wielded by anyone who possesses a special seal.

When the guiding katana takes someone's life, it turns into a red sword, the "Blood Katana", and therefore does not need flesh to accumulate guidance. As a small country, in order to surpass foreign countries and protect itself, war broke out. Basho, the leader of the empire, created an army of elites to fight against neighboring countries. They are called "The Celestial Stems" and are praised by everyone. "It is a privilege to serve and protect one's country, and one should sacrifice one's life if it helps make the country great and powerful": these are the words of the emperor...