King’s Raid: Ishi wo Tsugumono-tachi S01

A hundred years have passed since the defeat of the Demon Lord by the King-Knight. The apprentice knight, Kassel, is enjoying a peaceful life; but with the news of the appearance of demons in the region, his fate begins to change. Kassel, with the help of a wise man, finds trusted friends and together they set out to search for the sacred sword that can destroy these enemies.