Mori Yoshinatsu

Yakumo Koizumi, who changed his name to Lafcadio Hearn and became a naturalized Japanese citizen, met Saburo Koga, a government official, in a village he visited with his disciple Yaichi Aizu , and witnessed the main exorcism of the village's secret festival, Natsukoshi, and was transported to the \`\`Yūkai''. I got into it. Since then, Yakumo has been involved in strange incidents.

Summer 1936, Tokyo . Dr. Nobuo Orikuchi , a folklorist , stumbles into the old bookstore \`\`Yasakado'' and discovers a fake book in which his name has been borrowed without permission . The story contains the unbelievable past of the masked store owner, Heihachiro Kijima . Since then, Dr. Orikuchi has become involved in strange incidents.

As the Japanese folklore founded by Kunio Yanagita was involved in the formation of the Empire of Japan, the phantom indigenous people of Japan, the \`\`Mountain People,'' proposed by Yanagida, contradicted the descent of the descendants of the emperor, who is a living god, and the one lineage of all generations . It shouldn't have happened.'' Yanagida shuts down the mountain man theory. At the same time, he joins the Japanese Imperial Army in hunting mountain men. A few years later, a girl who is said to have mountain man blood is seen in Tokyo. Yanagita orders her excommunicated disciple, Hyodo Kitagami, to investigate, but...