Delusional Investigation – A Stylish life of Associate Professor Koichi Kuwagata(2012)

Delusional Investigation is a Japanese mystery series following Koichi Kuwagata, a bored associate professor of literature who decides to reinvent himself by solving complex cases. Partnered with Hitomi Kanno, a sharp-minded homeless student, Kuwagata uses his unusual ability to intuit criminal psychology to unravel puzzles that baffle others. When a professor dies in a suspicious fall from a university window on an unseasonably cold April night, whispers of a supernatural phenomenon called "April Ghost" spread among students. The university dean enlists Kuwagata to investigate the incident and uncover the truth behind the haunting legend. As Kuwagata and Kanno dig deeper, they must distinguish between genuine mystery and delusion while navigating the murky secrets hidden within the campus.