Nightmare Inspector: Yumekui Kenbun, Vol. 4 Shadows

A mystical private investigation for the dream world.Shadows Dreams on the menu in this volume: a man and woman trapped on a malevolent streetcar, a mysterious woman with a possible key to Hiruko's past, letters in a bottle that aren't the usual call for help, a young girl who dreams of a miserable future, a boy whose dreams could kill, and a nightmare in which Hiruko himself disappears!For those who suffer nightmares, help awaits at the Silverstar Tea House, where patrons can order much more than just Darjeeling. Hiruko is a special kind of private investigator. He's a dream eater. And he'll rid you of your darkest visions?for a price.

Shin Mashiba's first manga, Yumekui Kenbun (Nightmare Inspector), premiered in Monthly Stencil, a shojo magazine, in December 2001 and was then serialized in Monthly G Fantasy from 2003 to 2007.