Axe aside. I think it's OK to think of this story as the story of a side character, for example, this could have been all about the story of that guy that died by the snake biting his butt. Even if was we read wasn't the story about the real mc thar killed the demon, it was pretty interesting.
Though a shame that the world was quite Intresting, but it never gave any answer of what the flowers meant, what the layers meant, and what the demon meant. But you can make guesses, it was maybe a system, for preventing something worse for example.