Ever since she was little, Mashiro has been able to see ghosts-of people, of animals, and of some strange creatures that don't seem to be either. For years, she's pretended not to see the eerie sights around her, but then a chance encounter plunges Mashiro into the world of the inhuman Nomans. An accidental kiss leaves Mashiro partnered with Bazu, a human-hating crow lady, as she joins the Boundary Preservation Society to help the dead that walk the earth move on...