The 1910s. Iwamoto Kodo, a student at Suho Junior High School under direct military command, is investigating paranormal phenomena across the country as instructed. In a village rumored to have "black snow," he meets a boy with special powers who believes they are a curse; with Iwamoto's support, he discovers they may share a connection and receives a recommendation to the school. Mysteries await Iwamoto at every location he visits—a romantic tale of this era begins to unfold!