Yumekui Kenbun

Nightmare Inspector: Yumekui Kenbun (夢喰見聞) is a Japanese shōnen manga series created by Shin Mashiba. It first premiered in Monthly Stencile, a shōjo magazine, in December 2001 and was then serialized in Monthly GFantasy from 2003 to 2007. Nine volumes have been released in Japan by Square-Enix since 2007, ending the series. The manga has been licensed in North America by Viz Media, with all nine volumes released; the first being released on April 8, 2008. The series is set during the end of the Taisho Era in Japan. As of 04/27/2012 there are nine volumes.

Plot
For those who suffer nightmares, help awaits at the Silver Star Tea House, where patrons can order much more than just Darjeeling, tea, and coffee. Hiruko is a special kind of private investigator. He's a dream eater, a Baku. And he'll rid you of your darkest visions... that is, of course... for a price.