Asia, Japan.
There has been a legend among the mountain people in a certain place: behind the village where they live there is a hill that is not too high. The strange thing is that the top of the mountain is shrouded in thick fog all year round, making it impossible to see the way forward. Someone once wanted to explore into the fog, but they were never seen again. For a long time, the mountain people there no longer go near the top of the mountain, because they believe that there is a certain immortal living in that place, who uses magic to separate the immortal world from the human world forever. Anyone who intrudes is disrespectful to the immortal and will be reincarnated in another world forever.
Conception: