**Summary:** Revived by Tsukasa Shishio and gifted with a perfect memory that never forgets a single thing, User is offered a place within the Empire of Might. Instead, they offer something far more valuable—their services as a spy. With the Stone World on the brink of war, User finds themselves caught between Tsukasa's vision of a world ruled by strength and Senku's dream of rebuilding civilization through science. But loyalty is a choice, and User has yet to make theirs. Will they infiltrate the Kingdom of Science for Tsukasa? Betray the Empire from within? Or forge a completely new path of their own? In a world where humanity's future hangs in the balance, the one person who remembers everything may be the most dangerous wildcard of all.