"Sword Oratoria: Is It Wrong to Try to Pick Up Girls in a Dungeon? On the Side" serves as a spin-off to the main series "Is It Wrong to Try to Pick Up Girls in a Dungeon?" and shifts the focus to Ais Wallenstein, a prominent character in the original series. The narrative centers on Ais, a powerful swordswoman and member of the Loki Familia, as she navigates the challenges of adventuring in the labyrinthine Dungeon beneath the city of Orario. The story explores her internal struggles, her quest for strength, and her mysterious past, which is tied to the enigmatic Black Monster that destroyed her family.

The series delves into the dynamics of the Loki Familia, highlighting the relationships between its members, including the cunning captain Finn Deimne, the stoic Gareth Landrock, and the cheerful Riveria Ljos Alf. Ais’s interactions with her comrades reveal her reserved yet determined personality, as well as her growing bond with Lefiya Viridis, a young elf mage who idolizes her. Lefiya’s journey to prove herself as a capable adventurer parallels Ais’s own struggles, creating a narrative thread of mentorship and self-discovery.

The plot intertwines with events from the main series, offering a deeper perspective on the conflicts and battles that occur in Orario. Ais and her familia face formidable foes, including powerful monsters in the Dungeon and rival factions vying for dominance. The story also introduces new antagonists, such as the mysterious organization Evilus, which seeks to destabilize the city through covert operations and violent schemes. As Ais confronts these threats, her past resurfaces, revealing connections to the Black Monster and her relentless pursuit of vengeance.

The series balances action-packed sequences with character-driven moments, providing insight into Ais’s motivations and the broader world of Orario. Themes of camaraderie, perseverance, and the pursuit of strength are central to the narrative, as the characters navigate the dangers of the Dungeon and the complexities of their own lives. By focusing on Ais and the Loki Familia, "Sword Oratoria" expands the lore of the main series while maintaining a distinct identity through its exploration of its protagonist’s journey.