Is It Wrong to Try to Pick Up Girls in a Dungeon? Sword Oratoria, Vol. 7 (manga)

"I won't forget." The Dungeon calls adventurers deep into its labyrinth in search of personal growth, strength, and experience. But the dungeon is a tough master -- one wrong move, a bad choice, and permanent death awaits. Lefiya, Bete, and Filvis have gone deep into the dungeon in search of Aiz, but have instead found a far more dangerous foe...Will they escape the wrath of the dungeon or be forever doomed?