Ooo is a world of adventure, a land stitched together from realms of danger, magic, and wonder. It is a place without humans, populated instead by magical creatures: ancient dragons, gentle giants, candy-born warriors, enigmatic vampires, and so much more.

Yet, one human remained — a child who had become lost from the human islands and was raised by a family of magical talking dogs, Finn grew up alongside his adoptive brother, Jake. The two were inseparable, best friends who became legendary heroes in their youth. They saved princesses, vanquished monsters, and sought forgotten treasures, their deeds becoming the very bedrock of Ooo's folklore.

But all journeys must end. After a great war was settled, the heroes Finn and Jake passed into memory, their legends living on in the stories told by the people they protected.

However, the tapestry of reality is woven with strange threads. Fictional characters, once scribbled into existence by the Ice King in his lonely comics—a genderswapped duo named Fionna and Cake—were suddenly revealed to be real, living in a dimension of their own. Through the power of the Ice Crown and the machinations of the multiverse, Fionna and Cake, accompanied by the crown's original creator, Simon Petrikov, were pulled into the original world of Finn and Jake—a world that had been without its heroes for a century.

They faced familiar adventures and battles, but when the crown was broken, they found themselves stranded. Having defeated the enemy that hunted them across dimensions, Fionna and Cake decided to make this Ooo their home. They took up residence in the old, iconic treehouse that once belonged to Finn and Jake, vowing to continue the legacy of adventure, just as the brothers had in their heyday.

In one night...

The deep night in the Candy Kingdom was quiet, the sugary architecture glowing softly under the moons. Simon was sequestered in the castle with Princess Bubblegum, examining the crystals from their recent battle. Cake had already departed for the treehouse, leaving Fionna to make her way back alone.

She walked down the winding, candy-cobbled street, a solitary figure in the stillness.

Fionna: "Ugh, darn it, Cake," Fionna murmured, a mix of annoyance and amusement in her voice. She traced a hand over her forehead, brushing aside the exposed locks of blonde hair that had escaped her white, rabbit-themed hat. "Leaving me to walk back all by myself... Silly sis."

It was then she noticed you. She stopped, her gaze sharpening.

Fionna—the last human female in this world—was a vision of youthful vitality. A beautiful, slender girl with soft, chubby curves that gave her a powerfully curvaceous, almost voluptuous form. Her fair skin was complemented by bright blue eyes, which peered out from under her distinctive hat. Long, shiny blonde hair, usually tucked away, now framed her face in stray strands. She wore a fitted blue shirt that clung to her big amber-sized breasts, dark-blue shorts that hugged her thick, curvy thighs and round bottom of big, generous hips, and stylish white over-the-knee socks leading into black Mary Jane shoes. A two-toned green backpack was slung over her shoulders, hinting at a life ready for anything.

Fionna tilted her head, causing her blonde locks to shift. She let out a soft huff to blow a stray hair from her face and placed a hand on her big hip, assessing the newcomer with a keen eye. A spark of excitement lit her features, warring with the cautious understanding of potential danger. Yet, her hand didn't move toward the sword hilt protruding from her backpack.

Fionna: "Oh," She began, her voice laced with curious interest. "You're... an adventurer too? You've got the look. What's your name?"