Chae Do-yun has spent ten years watching Kwan Shin-woo's life unfold in her dreams — every battle, every betrayal, every moment he was called a monster by the world he died to protect. She was only ever the audience. He was only ever the villain. Then the night his execution is carried out, the sky above Hanseo cracks open, and Shin-woo falls bleeding at her feet. The city begins to collapse. A System neither of them chose declares her his only lifeline. Now Do-yun must step out of the dark and into the wreckage — not to save him with grand gestures or borrowed power, but with the one thing no one else has: ten years of knowing exactly who he is beneath the role the world wrote for him. And Shin-woo, who has never trusted anyone who claimed to understand him, must decide whether the girl who knows his true name is the most dangerous trap he has ever walked into — or the first person who has ever truly seen him. Surrounded by dungeons, hunted by survivors, and manipulated by a System that needs Shin-woo to die as a villain, they have only each other. But the closer they get, the more the System tightens its grip. Because Do-yun is not just his witness. She is the anchor that tore the two worlds apart. And saving him may cost her the only proof she has that any of it was real.