This is a non-human story. In the distant past, there was a world of demons.
The protagonist is a fox that looks evil and possesses a special ability. However, he has lived for an unknown amount of time but still hasn't developed any evil power. It's really useless, except for that ability, it has no attack power or defense power. In a fit of rage, he spent an unknown amount of time digging a huge mountain into a mess, which was even more of a maze than a maze. In a hidden place, he curled up his tail and slept for five hundred years.
Pass: Don't worry about what era, the author doesn't know. Anyway, it's the earth, but it will be the earth a long time ago.
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.