After reading some of the comments in the comment section, some readers may not understand the setting of the Otherworld on Earth.

This may be related to the individual's different perception of the other world. The other world in my perception is to go from the world where I am to another world. The other world is another world to me.

Therefore, the other world does not necessarily have to be a world of Warcraft, mages, and fighting spirits like Western Magic.

The era in which the protagonist lives is different from the current era, and the social elements have also changed. So I think it's okay to define it as otherworldly,

Of course, this is just my personal opinion. If there are any different points of view, you can discuss them more in the book review area.