Ep. 16: A director is killed by a Hannya-masked figure leaving only the phantom Sumire as a clue.
Aired on July 23, 2008

16
A renowned film director meets a violent end at the hands of an assailant wearing a traditional Hannya mask. The investigation into this homicide yields virtually no concrete evidence, leaving the detectives with a single, baffling lead. This clue centers on a woman named Sumire, who is revealed to be a non-existent entity. The case presents a unique challenge as the primary suspect appears to be a fictional character rather than a real person, complicating the search for the true murderer behind the mask.
Episodes
- Ep. 12 · Investigation into teenage suicides linked to Maki's past killing of his best friend
- Ep. 13 · The concluding segment of the client assignment narrative
- Ep. 14 · A designer shoemaker's murder mystery centers on the clue of red high-heeled shoes.
- Ep. 15 · Hostage demands Section Nine access to deceased prominent man's memories
- Ep. 16 · A director is killed by a Hannya-masked figure leaving only the phantom Sumire as a clue.
- Ep. 17 · The truth behind a secret emerges after the murder of two police officers.
- Ep. 18 · The first part of the narrative concerning the absence of observers
- Ep. 19 · The second part of the narrative where no one is watching
- Ep. 20 · The concluding segment of the narrative arc titled No One Is Watching