In the bustling city of Orario, where adventurers thrive exploring the treacherous 'Dungeon,' we find Bell Cranel, a timid yet courageous young man and the only member of the Hestia Familia. Assisted by the demi-human Liliruca Arde and skilled blacksmith Welf Crozzo, Bell, known as the 'Little Rookie,' climbs the ranks as Orario's fastest-growing adventurer by delving into the Dungeon's depths. Dungeon ni Deai wo Motomeru no wa Machigatteiru Darou ka II follows Bell's journey as he aims to bring honor to his goddess and safeguard his loved ones. As his accomplishments attract attention from various familias and deities in the city, they vie to recruit him into their fold.