Yamaneko is asked by a man to search for his missing girlfriend, Anri. However, it turns out that there's no Anri, or her family, listed at all in any registry.
Yamaneko obtains Hosoda's USB. He learns that prior to his death, Hosoda was researching a mountain that a real estate company had purchased.
Rikako's ex-boyfriend is murdered. Since a person wearing a Yamaneko mask is caught on a security camera, the police begin investigating Yamaneko.
While the Ouroboros, an armed group that sanctions wrongdoers, is causing a stir in the world, Nakaoka is attacked. He asks Yamaneko to find out the true identity of the group.
