Streaming: Crunchyroll
Episodes: 12
Source: Manga
Episode Summary: The land of Hinomoto was a peaceful one, until the Oni arrived and began to rule over the human population. Certain humans – warriors called Bushi – fought back, but eventually lost to the greater power of the demons. Now over a century later, the Oni have become central religious and authority figures in the lives of humans, and the Bushi have been all but forgotten. However, Musashi and his friend Kojiro, having been told about the Bushi in secret as children, have resolved to revive the battle against the oppression put upon them by the Oni.
As Musashi is processed through the school system, however, he appears to lose sight of his goals in the face of the relentless propaganda machine. He can’t find it within himself to outwardly make waves by professing his goal to become a Bushi, and he eventually graduates with the rest of his class and takes up his post as a miner. When Musashi meets Kojiro in secret, Kojiro refuses to believe in his resolve, partly to help ensure his friend doesn’t suffer the difficult life of a Bushi. But when Musashi and his classmates learn the truth about the Oni, it’s Musashi’s secret weapons practice and unwavering goal to fight against their oppressors that ultimately saves them. He and Kojiro make amends and once again set their sights on sharpening their swords and eliminating the Oni.