Something Is Off About This World

Li Hua used to think this was an ordinary world.

That is, until he ran into a ghost.

After encountering a ghost, Li Hua thought, Oh, so this must be a supernatural drama set.

Then, out of nowhere, a girl in a black tracksuit appeared and killed the ghost in seconds.

Just as Li Hua tried to strike up a conversation, the girl in the black tracksuit ran off.

???

What on earth is this world?