Not Just the Demon Lord of Another World

Mechanics fix things.

Soldiers break them.

Those were the two facts Perry experienced on Earth. When he was transported to another world and became a young nobleman with new magical powers, he found himself facing a difficult choice. He could try to survive on the front lines, a mysterious battlefield where hydras and demons roamed freely... or he could find another way.

So he made a vow. That vow made him a mage. A Lord of Magic. For now, at least, he had escaped his fate.