Duke’s Eldest Son is a Regressed Hero

Duke's Eldest Son is a Regressed Hero ManhwaOnce known as "The Dragon Slayer King," Aiden Albireo was a legendary hero who slayed the Berserk Dragon and saved the world by killing the Monarch of the Underworld, Underlord. However, he was betrayed by those who had once pledged their loyalty to him and was left to die"Who could have imagined I would return to life like this?"Aiden Albireo regressed to the body of Aiden Remez, the good-for-nothing eldest son of an unheard-of duke who died fifteen years before the Monarch of the Underworld's resurrection! HoweverThe very Monarch of Underworld he believed he had slain was imprisoned within his soul.Will Aiden be able to overcome this uncomfortable coexistence with the Monarch of the Underworld and prevent his resurrection?Hero, the eldest son of a duke, The Hero regressed as Duke's Eldest Son,, , The Hero Became the Duke's Eldest Son