[4][2] Masato Asō was a detective at Nizuma police station but was forced to resign.
He sets up an office in a building in Aoyama as a private detective.
Asō solves various incidents taking advantage of his former profession.
He is always trying to get a lot of money even in nearly illegal ways through work from clients.
[4] Each of Asō private detective office's members has their own profession, but helps Aso's investigation as a part-time job.