The Birth of the Detective, or the Fall of Man

High school student Kei Aozaki encounters a one-eyed girl who only he can see while investigating a case with Kaori Hamura, a detective and childhood sweetheart. After solving crimes and getting to know each other again and again, Aoqi found that he could change reality through this girl and achieve a perfect ending. At the same time, the shadows surrounding the three people in the past are also attacking them...