It is the Tenpo Era, 1830. Jinta runs away from home with his half-demon younger sister Suzune who was being abused by their father. Not long later, the pair are taken in by Motoharu, a guardian from the nearby village of Kodano. When their Miko "Itsuyuki" servant of the Fire God is slain by a demon, Jinta decides to take up the role of...

It's been 20 years since Matsue Yasuri rose to defeat Takahito Hida, the Lord of Oshuu and his rebellious followers at Hida Castle. Since then, the succeeding Shogun had decided to exile the hero and his family to the remote island of Fushou afterwards, fearing his powers of being able to slash his enemies without a blade....