My Lord Fires a Railgun

Franz was a genius five-circle summoning mage, but there was no place for him in a magical world ruled by contract magic that borrowed the power of otherworldly beings.

Franz falls into despair after repeated failures to make contracts with beings from other worlds.

Then the contract partner that appears before him is a battleship of the Terra Alliance?!

A hybrid mage of science and magic appears, one who fights aura masters with battle suits and dragons with photon cannons!