Manadeshi ni Uragirarete Shinda Ossan Yuusha, Shijou Saikyou no Maou Toshite Ikikaeru Comic
A Middle-Aged Hero / Betrayed by His Favourite Pupil / Is Revived as History's Strongest Demon Lord / Manadeshi ni Uragira Rete Shinda Ossan Yūsha / Shijō Saikyō no Maō to Shite Ikikaeru / The Betrayed Hero Who Was Reincarnated as the Strongest Demon Lord / The Ex-Hero Who Resurrected as the Most Powerful Demon Lord / The Old Hero Who Died After Being Betrayed by His Student Was Reborn as the Strongest Demon Lord in History / 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 / 被愛徒背叛而喪命的勇者大叔，作為史上最強魔王復活 / 被爱徒背叛而丧命的勇者大叔，作为史上最强魔王复活 / 애제자에 배신당해 죽은 아저씨 용사 / 사상 최강의 마왕으로서 되살아나다,
Hero Fried and his student Lyle face the Demon Lord, and Fried defeats the ruler after a brutal battle. As he moves to finish the fight, Lyle attacks him from behind, betraying his mentor. Though Fried should be dead, he awakens beside a demon girl who calls him the Demon Lord. Reborn as the new ruler, he must protect the demons under his command while facing his former companions.