Aiz Wallenstein, the Sword Princess, is known as one of the most powerful warriors from one of the most powerful groups in the city of Orario: Loki Familia. With them, she ventures into the deepest parts of the labyrinthine Dungeon beneath the city, stalking the monstrous denizens that lurk there and vanquishing them with the blazing light of her sword. But when she meets a certain white-haired boy, the encounter will change both of them forever...

A room bathed in crimson red blood, the air choked with the smell of iron, and a shattered skull atop a dead adventurers corpse...
Thanks to Aiz and crew, the tumultuous events of Monsterphilia ended without incident, and they were finally able to relax-but only for a moment. Soon, they find themselves embroiled in a suspicious case of murder. As they begin to investigate, the ladies soon realize that they're getting involved with a killer that's more horrifying than they thought.
"What, is this...?"
In the midst of all this, they find a mysterious jewel that may...

Aiz Wallenstein, the Sword Princess, ventures into the deepest parts of the labyrinthine Dungeon beneath the city of Orario, vanquishing its monstrous denizens with the blazing light of her sword. But when she meets a certain white-haired boy, the encounter will forever change them both.

The peerless Sword Princess can't seem to forget the sight of a young boy running away from her. Watching his receding back brings up memories from her own past and she begins to question her sole ideal of devoting everything to become stronger. For the first time ever, is Aiz is a bit troubled by her heart like any normal young girl

Aiz and her friends make their way to the town nestled deep within the Dungeon only to stumble upon a macabre murder! After determining that culprit must be extremely powerful, the manhunt begins but everyone seems to think that the Loki Familia might be the most likely suspects.