Bungo Stray Dogs, Vol. 1 (Bungo Stray Dogs, 1)

Having been kicked out of the orphanage, a despairing young man by the name of Atsushi Nakajima rescues a strange man from a suicide attempt--Osamu Dazai. Turns out that Dazai is part of a detective agency staffed by individuals whose supernatural powers take on a literary bent!