With the appearance of otherworldly oni, headed by the massively powerful Kishin, humanity has been forced to serve their new demonic masters. After 150 years of oni rule, the only force left to fight for human freedom are bands of Bushi. This is the story of two young men and their dream of forming the strongest Bushi band!

Musashi and Kojiro try to tackle the powerful Kishin that has appeared, but will the two of them really be able to stand up to the class of oni that has dominated Hinomoto for over a hundred years?

With the arrival of the Takeda Bushi band, Musashi is desperate to defeat the Kishin before they can.

Musashi and Kojiro's journey runs immediately into trouble when a mysterious girl steals their vehicle.

Musashi and Kojiro are forced to find a way to escape the Kosameda Castle prison, while Tsumugi is trapped between her desire to protect her friends and the commands of her domineering father.

Tsumugi struggles with deciding what to do next, and Musashi encounters a mysterious, and unhinged, Bushi in black.

Musashi and Kojiro are out to obtain the Kitetsu Blades they'll need to fight oni, but a mysterious ritual involving the mystical swords might prove to be an unexpected hurdle.

Shiro offers to help Musashi overcome his difficulties with Kitetsu Blades and get stronger, but can he be trusted?

As Shiro preys on the other Bushi who have gathered to hunt a Kishin, Musashi has to find a way to escape the lava pit and help his friends.

Musashi, Kojiro, and Tsugumi face off against Nanao and Shiro, and their only hope for victory might be the mysterious entity inside of Musashi.

The Obsidian Goddess tells Musashi that she will be going back to sleep inside of him and no matter what foes he faces, he must not die. Because he is her vessel and because Jisai died before they were able to finish what they started. Musashi wonders what that has to do with Jisai, but the Goddess doesn't have time to explain and decides to show Musashi how she fights in the material world.

Leaving for new adventures, the shock trio is already lost in the forest. During a confrontation against an oni, Musashi narrowly saves a young girl, whose role within the bushi is far from trivial...