Dead Detectives

Prologue

People don't know what a luxury it is to not know a thing of their past. I really don't understand why they cause themselves trouble. Well of course, not all people who died has their memories erased. It's for special people who either selflessly sacrificed themselves for the good of other people or, they died a gruesome death. 

But let me tell you a secret. The reason why there are souls roaming the land of the living, is not only because they slip away from me. It's because sometimes, I enjoy watching them fool themselves. Until it's no fun. 

To give you an example, let me tell you a story of five ghosts who became the dead detectives.