A novelist receives a letter from a female university student named Kubo about strange sounds that emanate from a room in her apartment. They begin to investigate incidents involving former residents, and eventually discover the shocking truths lurking inside the building.
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.
Set around Ide, Kyoto Prefecture, Japan, Sasaoka Yuri and Ogawa Yosuke have been friends since they were children. They are crazed about bicycling. The two grow up through interacting with people in town.
