Wāqwāq - Bunko jp Vol.3

Living in constant fear of attack from machines, mankind depends on the cyborg corps known as the Guardians to keep them from harm as they await the arrival of the Kami, a godlike savior with mythical red blood who can grant only one wish to one person. Now, Shio, son of a Guardian, thinks he's found the Kami--and all the Guardians are at war to get that wish!