Demon Slayer: Infinity Castle OTT Release: Know When and Where to Watch it Online? https://ift.tt/L1Tnj8W Demon Slayer: Infinity Castle OTT Release: Know When and Where to Watch it Online? Demon Slayer: Infinity Castle is an anime movie that has been written and directed by Hikaru Kondo. The movie revolves around the battle between Demon Slayer and the Lord of the Demons.