With You, in an Unending World

In his first life, Salvador Emrys was a cold-blooded assassin executed by his own father.
In his second, he awakens as Souta Kazuki - scarred, immortal, and branded the Tainted Monarch, a role that dooms entire kingdoms to ruin. Every wound burns with agony tenfold. Every cut feels like execution. Yet in this cruel fantasy realm of gods, curses, and spiderweb continents, he finds something he never had before: a family worth protecting.
With his sly fox-hybrid sister Ayame and loyal younger brother Ryu at his side, Souta rebuilds his shattered clan and swears vengeance on the kingdom that burned his old life to ash. But when a captured princess and her gentle sister enter his palace, the lines between monster and man begin to blur.
As rival kingdoms summon champions and ancient forces manipulate the board, Souta must decide: embrace the darkness of the Tainted Monarch and trigger the world's end... or fight for the fragile peace he's finally tasting - even if it means defying fate itself.
In a world that resets with every failure, one question remains:
Can a broken immortal find redemption... or will he drag everyone down with him?