Dungeon ni Deai wo Motomeru no wa Machigatteiru Darou ka Gaiden: Sword Oratoria
A side story of Dungeon ni Deai o Motomeru no wa Machigatte Iru Darou ka. It covers the story of the strongest 1st class adventurer "Sword Princess" Ais Wallenstein and her desire to reach even greater heights with her friends in the Loki Familia.
(Source: MU)