During the beginning of the Meiji Era, a strategic town in the North, Hakodate, has become the nesting ground of mysterious monsters known as "youjin." It seems the world's Great Powers are pulling the strings of the youjin.

Hyou, a 15-year-old girl has been fighting the youjin alone up until now under the guise of the master samurai "Miburo"... One evening, as Hyou was fighting for her life, she was saved by a noble, beautiful fighter, Himegami. Their meeting would affect each of their destiny. And now, the hidden truth behind history is going to start!