万物の声を聞く俺は、ルール怪談の世界で無双する

A black rain unleashed deadly rule games. A dying patient thrown into a brutal training ground wakes up able to hear objects talk. That gift helps him cheat greed, jealousy, and death itself. Cured, he enters an ancient opera troupe to save his fading parents. To win, he must pass a forbidden test and become the guide between two worlds.