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

Trenton had been working as a janitor for the city for the past two years, and he was happy with his job. He loved the security and stability it provided him and his fiancee. However, one day, he was cleaning the main office of the city when he found a strange, magical portal. When he stepped through, he found himself in a completely different world. There was a beautiful, epic battle taking place between two armies, and Trenton found himself drawn to it. He started to fight in the battle, and soon he was one of the most celebrated battlefield commanders. However, he soon found out that the battle was not just between two armies, but between good and evil. He had to choose a side, and he chose the side of good. As a result, he was rewarded with great power and respect. Now, he spends his time fighting against evil and defending the innocent.