Kei Watanabe is a fifth grade elementary school student. He has inherited the hunter's blood to hunt yōkai. To save the world from being destroyed, Kei Watanabe challenges a war against the yōkai.

The Great Yokai War: Guardians

花実のない森

The protagonist, who is looking for an apartment, accidentally opens a door to another world. There, he finds himself trapped in a huge, desolate building. It is a hellish place ruled by a certain monster, where neither going out nor dying is allowed!