The beast of the world, the monster of the legends... is in the shape of an extremely calm person? A unique spirit inside inside a full suit of armor travels the world of Deminious. There was not a single exposed part of the body, and on his back, a massive mace and massive sword.
He travels to the land of his fellow acquaintance, the king of the demon country, where he learns of the perilous condition they are in. He agrees to help out and travels back to the human continent, where he decides to infiltrate the castle of the queen as a royal guard and...
Kill her if necessary.