Fukakutei Sekai no Tantei Shinshi

Agyou Souma is the IDLA Class A Detective. IDLA stands for International Detective License Agency. It's a highly respectable agency that evaluates and classifies a detective based on one's ability as a detective, from Class A to Class F. There are only 30 Class A detective in the whole world and there are only 2 Class A detective in Japan.