After the tumultuous events in the Dungeon, Aiz has finally reached the vaulted Level 6! But in spite of this amazing news, the Sword Princess seems to be completely depressed. There are two reasons. The first is that she finally managed to meet the white-haired boy again, but once more, he ran away from her with everything he had. The second is that the monster tamer she fought so hard against knew her name–a name that absolutely no one else should know, and yet…Meanwhile, from the depths of the Dungeon comes a mysterious crystal ball that’s about to plunge both underground and surface worlds quietly into chaos!