On an ancient medieval continent, the Iron Mechanical Angels formed an alliance with humans to jointly combat the ravages of demons. This land was once a symbol of peace and prosperity but has now become a battlefield torn apart by war.The Iron Mechanical Angels are ancient and mysterious beings created by combining mechanics and magic by the craftsmen and alchemists of old. They possess bodies of iron and divine power, serving as guardians of peace and justice. The demons, on the other hand,come from the abyss, carrying endless hatred and destruction, aiming to turn the entire world into ruins.