Festival of Heresies novel was written by Rokakoen and is the first volume of the Sasaki Agency series.

There's a reason Emi Shimamoto can't find a job. For as long as she can remember, she's been unable to tell the living from the dead, and spirits have tormented her wherever she goes. Resigned to yet another failure, Emi attends an interview with Moriya Foods, only to find herself strangely attracted to its young president, Jan. Though it doesn't take Emi long to realize that something is off with both Jan and Moriya, she's far too smitten to care. Meanwhile, Emi's brother grows worried over his sister's change in behavior and pays a visit to an investigation agency that specializes in supernatural phenomena… What follows is a journey into the dark depths of cults, family, and the paranormal.