Dungeon ni Deai wo Motomeru no wa Machigatteiru Darou ka Movie: Orion no Ya (Is It Wrong to Try to Pick Up Girls in a Dungeon? Movie: Arrow of the Orion)
Orario is a megapolis with a magnificent underground labyrinth known as Dungeon. It is a place of excitement for the unknown, triumphant honor and romance with a pretty girl. While all dreams and desires lurk behind the scene, a boy meets a tiny "goddess".
"Follow me, Bell! It's time for the Familia initiation ritual!" "Yes! I'm going to get stronger!" A would-be-adventurer boy who has been rejected by all other Familia has a fateful encounter with a goddess who has no followers. The boy's journey is recorded by the goddess in "Familia's Myth".