A boy who awakens his memories of his past life wakes up to find himself facing a "zombie crisis." Is this some kind of American variety show world, or the world of Hunter x Hunter?

So the first thing to do now is to escape this city.

Question: Beneath the starry sky, there stands a beauty. Her long black hair flows like eternal night, her bright eyes shimmer like the stars, her immense magic makes the world tremble, and her unparalleled beauty compels all beings to bow before her. Who is this beauty?

“That’s right, it’s me, the Queen of Witches, Dorothy!”