The World's Finest Assassin Gets Reincarnated in Another World as an Aristocrat - S01

The world's greatest assassin had devoted his life to the organization that trained him, but in the end, they betrayed him, leaving him to die. Filled with bitterness and regret, his soul catches the attention of a goddess drawn to his unmatched skills. She offers him a second chance-reincarnation into a world of swords and magic-with one condition: he must kill the hero destined to destroy it. Agreeing to her terms, he is reborn as Lugh Tuatha Dé, the son of a noble family of assassins serving the Alvan Kingdom. His new father teaches him assassination techniques unlike anything he knew before, methods that aren't just ruthless but calculated and refined. As Lugh grows, his talents flourish, and he forms bonds with new allies. Yet he knows his training isn't enough-to defeat the hero, he must achieve nothing short of perfection.