In the Edo Period, an Onmyoji and a Time-Slipping Samurai During the Edo period, Haruaki, a young onmyoji who runs a consultation office called “Irohado,” one day encounters Toramaru, a samurai who has time-slipped from the Heian era. In order to defeat Kasumi Dōji, the oni responsible for dragging Toramaru into the Edo period, the two join forces. Thus begins their shared battle to exterminate demons across time—an oni-hunting adventure that transcends eras!