探偵少年A

Many people are in trouble in the big city. "Shirokuma Investigations" set up office here years ago, and it has helped numerous people with their problems.
Akira is a student. He admires his energetic aunt, who runs "Shirokuma Investigations," and he's learned a lot from her. One day, his aunt suddenly disappears, leaving behind a note, "I'm going on a trip. Akira, please take care of my business." Suddenly, he's become the head manager in the investigation office!
With the assistance of two cute girls, Akira manages to solve cases. Will he be able to become a full-fledged investigator, in whom his aunt would be proud of? What kind of cases will he and his assistants encounter?