Housewife Companion of the Hero!

In the town of "New Helio" in a certain fantasy world, a dungeon full of monsters suddenly appeared near a peaceful country one day! - To defeat the terrifying dungeon boss from which monsters keep overflowing, a hero was summoned from another world...! - The hero summoned from another world chose Eleanor, just an ordinary housewife, as his companion, aiming to defeat the dungeon boss!!