HAKYU HOSHIN ENGI

A once thrived kingdom, Yin—now governed by an evil hermit, Dakki, and her party—is in a chaotic status with its people suffering Dakki’s oppressions. Seeing this, The Hermit Band took it seriously and planned a "Houshin Plan" which is assigned to an apprentice hermit, Taikoubou, who gathered partners, captured and sealed all evil hermits, and planned to establish a new kingdom. On the other hand, the strongest and an Yin- royal hermit, Bunchuu, stood up against Taikoubou to protect the old kingdom with all his might. Thus, the death battle among invincible hermits begins... (Source: Crunchyroll) — Description from AniList community (anilist.co).