世界樹の魔物使い 異種族娘と征く魔境ダンジョン冒険録

Because of its size, the World Tree is a gigantic tree where each branch contains a different ecology and environment.This is a story about Sou, a demon tamer swordsman, who goes on a journey in search of the ``Fruit of Immortality,'' which is said to grow somewhere in the World Tree.