"Plant Spirits"

Maybe it was even closer than the abyss because people still had to enter the abyss gate and went through a tunnel to go to the abyss, but this one....

They didn't even realize that they had entered a 'domain'! 

Axelle's domain was a big island, but if this domain included the whole mountain range.... 

Well, Axelle's island was huge, as big as a small country, and this mountain range was obviously not the size of a small country. 

Still, it was enough to build a city directly on this mountain range! 

And because this domain was too close to the main world, people who met the requirements to enter this place could enter this place without even realizing that they entered a domain. 

Just what kind of place is this and who was the owner of the domain?