The world's most enthusiastic city, Orario, where adventurers challenge the unknown and the gods get excited about it. In the center of the city, there is a gigantic hole which leads to underground labyrinth known as the "Dungeon", where chaos and confusion lurk and infinite wealth and glory brought to the city are. In the darkest depths of the Dungeon, a monster was born. "...where... is this...?" The city is drawn into a strange and unusual situation it has never experienced before, over the young vouivre girl (a member of the Dragon family), who speaks human tongues. Man and monster. Values and common sense existing aimlessly are now being destroyed and the time has come for Bell Cranel and Goddess Hestia to make a decision. This is a "Familia Myth" experienced by a boy and written by a goddess that approaches the mystery of the Dungeon.
Bell and Hestia get embroiled in a war game against the Apollo Familia, which is a major force in Orario. A massive battle that involves the Soma Familia which is a familia of Bell's supporter Lili, rises. After the battle, Bell encounters Sanjouno Haruhime, a Renard-race prostitute in the red-light district. Bell being worried about her, the fight to change her tragic fate begins.
In the city of Orario celebrating the Festival of the Goddess of the Moon, Bell draws the legend spear that is said to be drawn only by the chosen one. There appears a goddess Artemis; Hestia's childhood friend. At her request, Bell and his fellows travel to a distant, unexplored frontier to defeat an evil monster. Newly written story by Fujino Omori (Original Work) about the bond between Bell and Artemis.
Ais, known as a reticent yet strong and highly renowned swordswoman, once again sets off for the "Dungeon" of Orario, together with her admirer, the novice mage Lefiya, and the fellows of the Loki Familia. Deep in the lowest levels of the dungeon, where the mysteries and peril are at their greatest, the "Sword Princess" summon the wind and pierce the darkness with a flash of her blade! This is the story of a girl who continues to pursue ever greater strength, and her fellows. This is their Familia Myth.
Bell is a young man who's come to Orario, a massive city with a gigantic underground labyrinth known as the "Dungeon", in search of the glory, the excitement to the unknown, and most of all, a romance with a pretty girl. His story begins with his encounter with the tiny goddess, Hestia. This meeting between a young, would-be adventurer who was turned down by every other familia, and a goddess with no familia members at all, will change both of their fates. This is a story experienced by a boy and written by a goddess. This is their "Familia Myth".