Alone. Surrounded by monsters. Armed only with his fists... Time to fight.

Jack Rust was a disillusioned biologist with a PhD—almost. When an extraterrestrial AI calling itself the System invaded Earth and thrust it into a world of aliens, magic, and violence, Jack hoped to at least get some magic himself.

Nope.

Even worse, the System spawned a forest dungeon around him and a goblin in his face....

Armed with nothing but his fists, Jack must grow strong enough to survive hordes of monsters. He needs to return to civilization and find out what the heck is going on. He might even get magic—or not. Surprising himself, Jack discovers that violence is fun.

In this battle-ridden new world, Jack finds the life he always dreamed about. He won’t just survive. He will thrive.

She became a dungeon core.

Everything pointed Delta to murdering her way to success. People were just mana farms, right?

No, that was wrong. Delta refused. Then everything became odd.