The Demon King's army advances, opposed on several fronts by both humans and demi-humans. Princess Cattlea, who Touka's elven ally Seras once served, joins the fight to the south, only for a horde of golden-eyed monsters to attack her base. Meanwhile, Sogou Ayaka is the last one standing against a wave of terrible foes. Determined to become stronger and not let her classmates down no matter what, she digs deep and awakens a powerful new skill. Can Touka and his Lord of the Flies Brigade survive the Forbidden Witch's domain and step onto the battlefield?