Opera

A sick young man who is both a swordsman and a druggist arrives, along with a poet whose appearance is flawless but whose intentions are questionable. A girl from an assassination group seeks to kill the young man. The world, which once ended and was revived by a man known as "the World King" and a bird-like God, serves as their stage. They begin a long journey centered on love that transcends death. Each volume of the series has a distinct title.