The Reincarnated Assassin is a Genius Swordsman

Raised as a living tool and devoid of human emotion, an elite assassin's grim existence came to a brutal end at the hands of his own master. Believing his story was over, he opened his eyes to a startling second chance at life—reborn as the youngest scion of the continent's most formidable and prestigious family. Armed with the memories of his past and the deadly precision of a killer, he sheds the shadows of the dagger to master the noble art of the sword, vowing to exact ruthless vengeance on his betrayers while fiercely protecting those who cherish him in this miraculous new world.