They’re back! The girls hailed as the Erotic Masters after solving the mystery behind the world’s toughest dungeon are now living legends! But behind the accolades and fame, they blew all their money and ended up deep in debt. Sometime later, after they finally paid off their debts, a blacksmith’s daughter named Hermetia came to visit them. She had been randomly selected to be allowed to explore a newly discovered dungeon, but it was too difficult for a novice. That’s when she came to the DunEro Masters with a proposal: Will they explore the dungeon with her? Explore the dungeons and acquire maps with these beautiful warriors. Grow stronger in battle alongside all-new girls. Gain lots of experience and face powerful enemies! It’s time to set off on your adventure! She grew up without a mother and sees her entire village as her family. Her master, Morissimo, is over 60 years old while the village chief San is even older. Although Martina’s lifespan is longer than a normal human, she refuses to discuss her age. The Fire Tribe seemingly has a few secrets, and those will be uncovered throughout this story. After finding what looks like a bike helmet with a symbol in an ancient ruin, she has spent every day attaching armor to it and enhancing it in the smith. Her muscles and stamina make her as powerful an attacker as Donelia and a reliable ally in battle. This rumor started spreading after she got into a fight with a mercenary and won one day. She was discovered by King Morgaia and joined the Royal Knights, but she has since left them and now spends her days as a dungeon-crawling adventurer. She has a twin sister. While traveling in search of information about their birth and why they were orphaned, they passed through the Magical Kingdom of Tychlluina where her sister became one of the Royal Mages.