Seekers of All Realms

One day, a man came to the human world. No one knew where he came from, and no one knew his name, until one day he killed a demon king with a sword, and the order of the three realms began to become chaotic... .................................................... I want to ride the wind back home, but I'm afraid that it's too cold in the high places... .................................................... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.