JJK: Behind The Strongest

When Satoru Gojo was born, the balance of the jujutsu world shifted. Curses grew stronger. Clans grew restless. Sorcerers whispered about the child who would one day stand above everyone else. And in Kyoto, almost unnoticed, another child opened his eyes with memories that did not belong to this life. Rei Mikage is born into a minor jujutsu family, one useful enough to serve the great clans but never powerful enough to stand beside them. To the world, he is a quiet support-type sorcerer with a modest inherited technique suited for tracking cursed residue, reading traces, and helping from the rear. That is the lie he needs everyone to believe. Because Rei remembers the story. He knows what Satoru Gojo will become. He knows what Suguru Geto will lose. He knows the name Kenjaku. He knows about Sukuna, Shibuya, the disasters waiting years in the future, and the people who are supposed to die before they ever understand the game being played around them. But knowledge is not strength. And in the world of Jujutsu Kaisen, being noticed by the wrong monster is often worse than being weak. Rei’s only advantage is a System known as the Cursed Archive Roulette, an impossible ability that allows him to extract and equip templates from existing sorcerers, curses, and anomalies: cursed energy reserves, output, efficiency, reinforcement, innate techniques, barrier skill, reverse cursed technique, combat instincts, binding vow aptitude, and even fragments related to the soul. One template per category. One hidden build at a time. While Gojo grows into the strongest in the light, Rei builds himself in the shadows. To everyone else, he is a background actor. A support sorcerer. A useful extra. But behind the strongest, something else is growing. Something modular. Something patient. Something that knows how the story ends. And this time, it intends to change the ending before anyone realizes it was ever there. — Description from novelcodex.org