Phantom Reign

Growing up, Rei Tsukihara, always had one dream to become the mastermind: someone so powerful, so respected, that even the leaders of nations would seek his counsel before making their next move.



To reach that level, Rei pushed himself harder than anyone else. He trained his body until it was a weapon. He sharpened his mind until it was a fortress. Every day, every choice, every sacrifice—he made for that one goal.



And just when he was nearing the peak...



He died.



An accident.



But fate wasn't finished with him.



Thrown into another world with nothing—no powers, no system, no cheats—Rei starts again from zero.



But this isn’t your typical isekai.



Because Rei isn’t here to play the hero. With the strength he built in his old life, and the mind of a strategist who’s already faced a world of ambition and cruelty—he’s going to climb higher than ever before.



This world doesn’t know it yet...

But its future mastermind has already arrived.