Have you ever felt like there was something inside of you pushing your actions? A dormant beast, so to speak. I know it sounds crazy. But, that’s the best way I could describe how I’ve felt for a long time. I thought it was normal, some animal part of the human brain that lingered from evolution. But, this is the story of how I learned I wasn’t exactly human, and there was a world underneath our own where all the things that go bump in the night live. And, that my beast was very real indeed.

The Dungeon is a place of magic and mystery, a vast branching, underground labyrinth that has changed the world and the people who dare to enter its depths. Those who brave its challenges are rewarded with wealth, fame, and powerful classes that set them apart from the rest.

I thought I’d left my past behind for good. But when my older brother gets killed in a car accident, I’ve got to come back to take over his car-tuning business. But things are not like I remember. There’s something weird going on in Santo Domingo, something that seems connected to the city’s underground street racing scene. There’s the orange-haired mechanic at the tuning shop with the FOXGRRL license plate. There’s the strange black cat hanging around my house, and the dreams I’ve been having about a racer girl with cat ears and a tail.

Growing up, she was the girl down the street. Even then, I knew she was different. She was tough, rough, and had the strength to stop a speeding car with her bare hands. We were as thick as thieves, sharing every adventure. Then one day she revealed a secret. She wasn't from Earth. She was from a distant place called the Arcadia Multiverse. Her people lived under the rule of a god-like entity known as the System. That System had its gaze fixed on Earth. And it was only a matter of time before it came for us.

Rune Tellarus always wanted to become a Guardian: a powerful warrior bonded to a magic-wielding woman known as an Adeptal Mage. Except he failed the test as a youth. He thought he would never get the chance to study at their Academy nor learn magic. But after a terrible tragedy in a nobleman's home, he finds himself suddenly bonded with the nobleman's daughter, Narcissa. This bonding is an irrevocable merging of two spirits that grants both Mage and Guardian magical gifts.