Description:

A young man named Kurtz pledges unwavering loyalty to Artesia, the fallen head of a ducal family. Upon discovering that Artesia’s death was orchestrated by the six great ducal houses that secretly rule the world, Kurtz spends ten years preparing before returning to the past. Now a 10-year-old orphan, Kurtz uses his knowledge of the future to recruit individuals destined to die into his ranks, turning them into invaluable allies. With their help, he begins his covert operation to save Artesia and surpass even the six great ducal houses to become the true mastermind! “This is the ultimate solution I devised to kill you.” A dark fantasy epic of unstoppable scheming and rewriting the very fabric of the world for the sake of his one true love!

Alternative Titles:

やがて黒幕へと至る最適解, The Optimal Solution Leading to Becoming the Mastermind