Rie calls on Shinjūrō and Inga to accept a request from Mitsuko Sasa, whose adopted brother Kazamori caught on fire and died, allegedly related to a curse from her father, Komamori, who died in a similar manner seven years ago. As Izumi's group conducts their own investigations on the cause of Kazamori's death, Inga uses her powers to reveal that Kazamori is actually a supercomputer.

Shinjuurou, along with Rie, Izumi and some others, receive strange invitations supposedly sent by Rinroku. They are brought together at a table where they are presented with weapons, Shinjuurou believes that the imposter Rinroku was the one who appeared at Rie's home, deducing that the Diet member and Rinroku's bodyguard caused the explosion. It is at this point that Rinroku himself seemingly appears with Inga, only for Shinjuurou to deduce that he is actually Izumi's assistant, Shingen Hayami, using Bettenou's power, with the real Rinroku having disguised himself amongst the attendees, having previously faked his death. After a fierce battle, Inga defeats Bettenou and devours her. After the incident, Shinjuurou explains his relationship with Inga to Rie.