Ryuuji Harada

There are all kinds of people living in the back street tenement houses in old Edo. One of them is Ashiya Dosan, the descendant of an Onmyoji who made a name for himself back in the Heian period. Unfortunately, unlike his forefathers, Dosan has not made much of a living off the fortune telling and amulet peddling that he does.

Aoi is a moe-type maid working on a wealthy Osaka estate. In reality, though, she is an undercover detective sent by the police on a special mission to investigate a suspect.