The Betrayed Hero Who Was Reincarnated As The Strongest Demon LordManadeshi ni Uragirarete Shinda Ossan Yuusha, Shijou Saikyou no Maou to Shite Ikikaeru; 愛弟子に裏切られて死んだおっさん勇者、史上最強の魔王として生き返る; The Betrayed Hero Who Was Reincarnated as the Strongest Demon Lord; A Middle-Aged Hero, Betrayed by His Favourite Pupil, is Revived as History's Strongest Demon Lord; 애제자에 배신당해 죽은 아저씨 용사, 사상 최강의 마왕으로서 되살아나다; 被爱徒背叛而丧命的勇者大叔，作为史上最强魔王复活; 被愛徒背叛而喪命的勇者大叔，作為史上最強魔王復活; Der alte Held, der von seinem Schüler verraten und als stärkster Dämonenkönig der Geschichte wiederbelebt wurde