Den was a video game playing shut-in before the magic crystals powering the Empire fizzled out. He is shipped out to live and work at his grandmother’s in the country: Suburb 23. He wants independence. With nothing to lose, he decides to become a career adventurer like his Isekaijin ancestor who had traveled to Isekai New horizon 3 to hunt monsters for their Essence Ore in the hundred-layer subterranean Primordial Hollows. Lucky for him, he is not the only one thinking of striking it rich in the Essence Ore business. He joins the spunky girl Rika whose dream is to gain wealth and fame by clearing the Hundredth Layer. They’re going to need a party of five. And they’re going to need money. A lot of it. They have the will and the spite, but with only his anime tee on his back and a pry bar and sharpened stick between them as weapons, how will they not only survive the ending of their old world, but make a new one for themselves as Career Adventurers?