With the arrival of the Primogenitors, the Electoral War for Itogami Islandplunges
further into chaos. Shio and Yuiri head to the island intending touse Twelth
Primogenitor, Avrora, to put an end to the conflict, only to comeface to face with
Second Primogenitor, Fallgazer. While Yukina rushes to theisland to save the three,
elsewhere Kojou is suddenly overcome byinexplicable hunger and thirst, which is
apparently tied to the Beast Vassalsthat resonate with the Primogenitors. Just what
will Kojou have to do toregain his strength and stop the Beast Vassals' rampage?