The stage is Shinonome Detective Agency in the back alley. Kazuki, a detective who takes care of everything from searching for people to exterminating ghosts and a part-time science student who has a feeling for Kazuki in the wake of a certain incident. Hoshihiko says that he was attracted to the smell and followed Kazuki. The door of Shinonome Detective Agency is opened because of this new client...

Note: Originally intended as a oneshot but has since been granted serialisation.