Reborn as floor staff in a dungeon, Aine and Nacht are stuck mopping up after unruly monsters and inconsiderate adventurers day in and day out. The pair's efforts have successfully given their friendly workplace a murderous reputation, but with the labyrinth's challengers starting to employ dirty tricks of their own, the two will need to plumb the depths of the dungeon's mysteries to find a way to stay in business! Not even a bloodthirsty mimic is scarier than a dwindling bank balance, but it can't be that hard to get rich quick in an isekai...right?