Orario has erupted in fear and bewilderment as weapon-wielding monsters appear above ground. This Irregular is drawing every power residing within the city into a whirlwind of trouble. For Loki Familia, this seems like the best lead they have so far in their search for the key to the man-made dungeon. The Sword Princess steels herself as they begin their search, but in this fateful battle that revolves around people and monsters, Aiz will have to grapple with much more than she bargained for.