Darker Than Black

(Shizuo x Izaya) (cover changed)
Folklore, fairy tails, stories, myths; that was what they were thought to be. Until the day a certain informant has an unfortunate encounter...

If Dullahans exist, then what other ancient legends could be out there?

P.S.
I decided on the title before I found out there is an anime with that name... I'm not going to change it.