Is It Wrong to Try to Pick Up Girls in a Dungeon? On the Side: Sword Oratoria Vol. 8
"With the deadly clash on the twenty-fourth floor over, Aiz and the others return to Orario to deal with their losses. However, Loki Familia are not long for the surface, as they have declared an expedition to unknown dungeon territory—the fifty-ninth floor—in search of answers. Preparations begin, and soon the Familia sets out with allies alongside.
All the while, Aiz is still determined to spend some time with Bell. Thanks to some help from a friend and a little bit of "luck," Aiz may actually get more than she initially hoped for…!"