I'm looking for a specific anime. In this anime, the main character is in another world with a girl (for some reason or another it's his wife). They go to some kind of learning institute where you can be a power fighter or a type of magician.
The girl is extremely strong but the MC does not posses the power or have the capacity to harness the energy in that world. There's another job that best suits the MC, a Forger. This is where the anime is distinctive from the rest in that a forger creates a weapon by drawing the weapon using a special pen infused with a magic crystal and since the MC has knowledge from his previous life and was a damn good artist he already qualifies to be a student in that field. He tries a number of things like a car, or machine gun and stuff (those didn't work out) but with his creations this is how he does battle.