Before the demons invaded, Nathan had everything he ever wanted. Women, power, magical talent, wealth, a fortress full of loyal soldiers. Now, a beautiful demonic general offers him a choice: Die; or start a new life with her in the past and rewrite history. Nathan accepts and is sent back in time to before the end of the world.

The local wolffolk mafia longs for their glory days, and their alluring don, Alessia Lionetti, wants a powerful enforcer to bring them back. That's Vince. This is his big break from his days as a hired thug. Working for the mafia has a short life expectancy, though. Especially in a world where the masquerade shattered long ago. Demons run banks, birdfolk ferry people across town, and the police possess crack teams of sorcerers to keep the peace. Bad news for Vince and his dreams of mafia wealth.

When a God of War barged into his apartment, Jake had no idea what to expect... but it wasn't being forced into a never-ending war against evil invaders, or that the battle would strangely resemble the MMORPG games he loved. Working hard and building himself up from almost nothing, Jake would need every bit of knowledge and preparation to master his new class of Summoner. Joined by a sly Demoness with an ancient past and a shy Valkyrie hoping to prove herself in battle, they'll find excitement and enjoyment as they level and grow in power.

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.

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.