Due to an accident, the young Nanoka lost her family when she was only seven years old. After eight years she goes back to where it all happened, but somehow she is sent back to the past, during the Taisho era. Here he meets the young Mao, a boy who fights demons in order to find the creature that cursed him. What is the meeting between the two due to? What is the connection between the two worlds? The contrasts between Mao and Hakubi, one of his master's senior students, continue. Hakubi wishes to gain control of Byoki but knows that he will not be able to do so using the spells of the onmyodo. The onmyoji will be the means that will allow him to reach his goal, and so he decides to lure him into a trap using a boy to whom Mao has helped ...