Prompt: Write a short story about a man who discovers a magical portal

Guy was walking through the city, minding his own business, when he suddenly found himself in front of a portal. He had no idea what it could do, but there was something about it that peaked his interest. He stepped through, and a moment later found himself in a strange world. There was a beautiful woman standing in front of a castle, and she beckoned him to come closer. He did so, and she told him that he had been chosen to become part of her kingdom. He was amazed by her story, and decided to explore this new world more.