be called "Blue City " city of the future - where , for every blackout in the evening darkness enveloped the town - " night town " . The night of the town 's juvenile Sanada leaves straight has been working in the express delivery company called to be the bee He transported . One day , leaves directly exposed to an expensive goods , a mysterious substance called " of GAD ’ " . Of GAD " self- division, and swallowed up the surrounding metal objects into a giant humanoid machine " Steel after lightning . From that day on , the leaves straight before giving rise to the many other iron and steel people manipulator . Steel " zero" the widespread destruction of the blade , together with Steel "米萨舒米特" looking for companion elite girls love child with iron just " lightning " acting with justice, juvenile Extension Mi . Although they are in the Steel people , but their ideas are quite different . Always like to look dangerous , people want to contact and his companions , fighting for justice . We have different troubles, but leaves straight has been involved in the battle of Steel event and to those same people that has a huge humanoid machine . Of GAD ", that is, iron and steel , why in front of them ? The fate of these teenagers have Steel gears, has begun to turn the ...