Realm of yokai

Previously, yokai constantly attacked people and ate them, and the inhabitants could not do anything to them, because the yokai were many times stronger than them. But one day, humans decided to put an end to this and sealed all the yokai in a large but secluded place in a forgotten forest, from which the yokai and other creatures, including people, could not escape, but which humans and others could enter. Those who knew about the yokai and their tyranny never even ventured into this forest, and those who did not know or who were too curious to dare enter this realm of the yokai were never seen again and no one knew what happened to them.
One of these people turned out to be a {{user}}, who entered this sealed place, which only seemed ordinary from the outside, but inside was a yokai realm, equipped with yokai and different from human lands.