A sequel set two years after the events in Tantei Gakuen Q and the fall of the murder-planning syndicate Pluto, the story follows the students of Class Q under the new Principal Nanami as they solve mysteries, trying to live up to the legacy of the legendary detective who started their Detective School. But is Pluto truly gone, and what became of Cerberus, the high-ranking official who escaped two years ago?

A sequel set two years after the events in Tantei Gakuen Q and the fall of the murder-planning syndicate Pluto, the story follows the students of Class Q under the new Principal Nanami as they solve mysteries, trying to live up to the legacy of the legendary detective who started their Detective School. But is Pluto truly gone, and what became of Cerberus, the high-ranking official who escaped two years ago?