Charge Magician

Technology nerds travel to a world similar to the Middle Ages, and the history of struggle from a low-level serf to a top lord. Open up wasteland for farming, develop animal husbandry, smelt steel, build a new army, and fight all the way to the orc capital. I have a Raikiri in my left hand and a submachine gun in my right hand. I am strong in magic and technology!