Having defeated Kirihara Takuto and recruited S-class hero Takao Hijiri and her younger sister Itsuki, Mimori Touka is finally ready to march on Alion. Vicius, meanwhile, has procured the heart of the Demon King. As the combined forces of the Lord of the Flies Brigade, the Empire of Mira, and the Country at the End of the World advance on the goddess's seat of power, she races to destroy the Realm of the Divines. Can the resistance stop her before she gains enough power to slaughter both mortals and her fellow divines? Or is it already too late?