This Comedy anime series is centred on Keiichiro Nagumo and his detective agency. Twenty years ago he was one of the country's top detectives even though he was still in high school... now he is jaded and suffers from various aches and pains. One day Mashiro Nakanishi, an enthusiastic school girl, approaches him asking if she can become his apprentice. He initially refuses but lets her help with one case; it works out and they end up forming an unlikely duo. As the series progresses they take on a number of cases and further characters are introduced.
I thought this series was really fun with plenty of laughs to be had in every episode. Keiichiro is a fun lead with his aches and cynicism but it is Mashiro who provides most of the laughs with her enthusiasm (and strength). The secondary characters are entertaining as well. The animation and character designs are good; frequently depictions change to add to the humour. Overall I'd certainly recommend this to anime fans wanting a good laugh.
These comments are based on watching the series in Japanese with English subtitles.