Kyokou Suiri Portable -

The narrative hook is simple yet compelling: A girl who acts as a detective for spirits pairs up with a boy who is anathema to spirits. Together, they solve mysteries that plague the boundary between the living and the dead. However, unlike traditional detectives who rely on physical evidence and forensic science, Kotoko’s methods are far more theatrical and psychological.

This arc revolves around a vengeful spirit—a ghost wearing samurai armor—that is attacking people. The local police and even Kuro are baffled by the physical evidence. In a traditional mystery, the detective would look for footprints, DNA, or motive. Kotoko, however, realizes that physical evidence is irrelevant when dealing with spirits. Spirits exist on belief and fear. Kyokou Suiri