Is It Wrong to Try to Pick Up Girls in a Dungeon? Novel Volume 9 is written by Fujino Omori with illustrations by Suzuhito Yasuda.

In the new dungeon, The Great Forest Labyrinth, a dragon girl named Wiene has appeared and Bell meets her! Seeing that she is neither human nor monster but something entirely different, Bell promises to protect her but...

A band of violently immoral hunters slowly worm their evil influence into the Dungeon and begin to wreck havoc, irreversibly causing strife between people and monsters. Amidst all this, the Guild begins to move and the true master appears. All these events revolve around the vivre girl Wiene and cause waves in the city above as well!

The irregulars will shake humans, monsters, and even the gods to their core. The young hero walks his path and the goddess records it--the Familia Myth!

Is It Wrong to Try to Pick Up Girls in a Dungeon? Novel Volume 10 is written by Fujino Omori with illustrations by Suzuhito Yasuda.

After encountering intelligent monsters in the Dungeon, Bell and Weine share a tearful goodbye as Hestia Familia return to the surface short one member. But not long after their parting, the Guild confirms the existence of armed monsters and immediately calls on Orario's strongest to exterminate this threat. Bell is forced to make some of the hardest decisions of his life when he's the only thing standing between a massacre of monsters and adventurers.

Is It Wrong to Try to Pick Up Girls in a Dungeon? Novel Volume 11 is written by Fujino Omori with illustrations by Suzuhito Yasuda.

As a cost for saving the young dragon girl Wiene, Bell's name has become synonymous with "greedy", "despicable", and "traitor." He and his familia have completely lost the trust and respect of everyone residing in Orario.

There's no time for him to feel sorry himself when his newfound monstrous friends, the Xenos, need his help to get home. But when the greatest obstacle in their way is Loki Familia, does Bell have what it takes to raise a fist against his beloved idol, the Sword Princess Aiz Wallenstein?

Is It Wrong to Try to Pick Up Girls in a Dungeon? Novel Volume 12 is written by Fujino Omori with illustrations by Suzuhito Yasuda.

And so the boy begins to run again. Bell has grown through combat with his greatest rival. A rank up, a denatus, a new nickname...as he draws attention from the people and deities of Orario, the young adventurer receives a letter. "A mission...an expedition?"

Bell has reached a higher level, and he must therefore take on an even more challenging adventure. The order from the Guild leads him toward a new stage. And so, a faction alliance sets out for the Dungeon. Alongside his companions, Bell faces new floors, new monsters, and new unknowns.