What if your reward for saving the world was betrayal? In Kizuka Nero's *Nidome no Yuusha*, Ukei Kaito discovers the bitter truth of misplaced trust. Summoned as a hero to a world besieged by darkness, he dedicates himself to vanquishing the Demon Lord. Victory comes at a steep price, bought with tireless effort and unwavering resolve. But instead of celebration, Kaito faces a shocking betrayal. His closest allies, those he considered friends, strike him down, extinguishing his life in a moment of cruel treachery. From the ashes of despair, a burning desire for vengeance ignites. Granted an unexpected second chance, Kaito vows to shed his naive ideals and embrace a single, all-consuming purpose: retribution. No longer bound by notions of good and evil, he sets out to inflict unimaginable suffering upon those who wronged him. His dying words, a chilling promise, become the foundation of his new existence: "I'll kill every single last one of you… I swear it…" But fate has more in store. A cryptic voice shatters the silence, declaring that Kaito's journey is far from over. The words "Tutorial Mode has been terminated" flash before his eyes, heralding a new and dangerous chapter. *Nidome no Yuusha* delves into the complex themes of betrayal, revenge, and the seductive nature of power. Will Kaito succumb to the darkness that threatens to consume him, or can he find a path beyond vengeance? Prepare for a dark and captivating tale of second chances and chilling consequences, where the line between hero and villain blurs with every act of retribution.