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!

Even Yuno couldn’t stand up to Mars and his mineral magic—does Asta have a chance...?!