Demon Slayer: Kimetsu no Yaiba

Tanjirou Kamado's life changes drastically after his father's death, and he's left to support his family. Prior to this, they lived a relatively peaceful life in a remote mountain region, where Tanjirou made a living selling charcoal in the nearby village. On one trip back home, he encounters a stranger who warns him about demons that roam the woods at night. Returning to find his family slaughtered, Tanjirou's life is turned upside down when he discovers his sister Nezuko has been turned into a demon.