A manga that kills you if you read it──The curtain rises on a shuddering Occult Horror Suspense!! The latest work by the genius Yamori Tsuji of Meguru Mirai! One day, a manga artist jumped to his death. The trigger for his death was a manga called Legion── The remaining editor-in-charge, Toba, and the artists older sister, Chiharu, open the forbidden door as if guided by his death... without knowing what is waiting for them there. Reality is being eroded by things from another world. An unprecedented Occult Horror Suspense has arrived!