In the heart of Orario, a bustling labyrinth city, lies the enigmatic Dungeon—an abyss teeming with chaos, riches, and fame. Amidst this tumult, a peculiar event unfolds: the emergence of a dragon girl fluent in human speech. As the city buzzes with this unprecedented spectacle, traditional norms and beliefs are shattered, forcing the young adventurer, Bell Cranel, and his patron goddess, Hestia, to confront a pivotal choice. Follow Bell as he dauntlessly navigates the Dungeon's enigmas, chronicled by a divine hand in the tale of their Familia Myth.