Synopsis: The Heroic Tale of An Upstart Explorer in a World Full of Dungeon

In modern-day Japan, where dungeons have appeared, 16-year-old middle school graduate and dirt-poor explorer Amahara Hayato experiences a major turning point after meeting a mysterious beauty named Hexa!? Using the skills she gave him, he rapidly climbs the rankings!! From rock-bottom explorer to the top: The fastest, strongest dungeon hero tale!