After conquering the hardest of dungeons, the heroines have earned the titles of "Erotic Master", and have cemented themselves as living legends! However, it's not long before their old habits reemerge, and they take on so much debt from their nighty "escapades" that they find themselves trading in their legendary armor just to pay the bills. There isn't a soul that hasn't seen these gals nude at this point. Some time passes, and just as they finally pay off the last of their debts, the blacksmith Helmetia visits them. It seems it's always been her dream to become an adventurer, and she even got a pass to enter a recently discovered labyrinth. However, the difficulty seems way too high for a novice like her. For the Erotic Masters, though? It should be a cinch. They accept her offer, but how will things go this time?