(from ebookjapan):

Rokuto Fuyuki used to be feared as a demon detective by the evil people. Now he is a pacifier who pays off the evil people.

Oroku, who came to Hokkaido in pursuit of a man and a woman who absconded from the syndicate with a sum of money of...

…5,000,000 yen, was confronted by a woman from Oroku's past.

The book contains five stories in the "Oroku Series" and two other works.