Lefiya, the newest mage to join the Loki Familia's delving team, has a simple reason to risk her life exploring the deadly labyrinth of Orario: to prove herself worthy of serving together with her hero, Sword Princess Aiz Wallenstein. However, what nobody knows is why Aiz is there herself… at least, not until they reach the previously untouched 59th level and things start to get ugly. If you loved the adventures of Bell and the Hestia Familia, get ready to view the world of Danmachi from an entirely new perspective!