Fukushuu Kansuisha no Jinsei Nishuume Isekaitan

Kousuke Kurono, known as the Avenger, lived a life consumed by vengeance. His world shattered when his younger sister was brutally assaulted and abandoned, left to perish in the freezing cold. At just thirteen, he dedicated every waking moment to plotting retribution. Five relentless years later, he finally achieved his goal—justice served with his own hands. Yet, with his purpose fulfilled, emptiness took hold. No longer driven by rage, he saw no reason to continue living. In a final act, he turned the same blade used for vengeance against himself. As darkness closed in, an unexpected voice echoed: “What a waste.” When his eyes opened again, everything familiar was gone—his home, his nation, even his reality. He awoke in a world entirely unknown.