The Revenge of the Betrayed Strongest KnightNew裏切られた最強騎士の復讐 ; Uragirareta Saikyou Kishi no Fukushuu

Klein, who fell from the throne of the King of Knights, was betrayed by his comrades and sentenced to be burned at the stake. In his final moments, Klein scoffs at the foolishness of this world and his past self. Now, having returned from hell, Klein has gained unparalleled power. He will make those who betrayed him pay the price...