MPD Psycho

Kazuhiko Amamiya is a detective who, after seeing the torture and subsequent death of his girlfriend, tracks down the man responsible for her death. Upon meeting the killer, Kazuhiko's psyche breaks and a new personality, the cold-blooded, arrogant psychopath Shinji appears and kills the murderer. More personalities materialize from Kazuhiko as he tries to investigate a string of murders years later. As he investigates, an intricate conspiracy plot begins to tangle up both Kazuhiko and Shinji as well as those around them.