Izuru was a talented young detective with a lot of potential and a bright future in the career. However, five years ago, while still an intern handling a case, he was involved in a bloody incident. He doesn't remember anything about it. This led to his demotion from Tantei Gakuen, the number one detective school in Japan and one of the best in the world, preventing him from becoming an actual detective.
—Inspired by a manga series called: Ron Kamonohashi's Forbidden Deductions.