Beautiful Legend

The Naga Kingdom where the protagonist appears is a peaceful world with a history of two hundred years. It is surrounded by the sea on three sides and an endless forest on one side. How big is the entire forest? It's probably as big as the Naga Kingdom. What's in it? There was nothing but some trees and animals. At least that's what the people of Naga Kingdom think. So why didn't they want to go to the forest? This... You know, there were no cars at that time, so walking was very troublesome. Of course, some people have entered the forest. There is no danger in it and it is not a forbidden area. A month later, the traveler came back half-starved - he had walked about 1/10 of the forest.