Hi guys! I haven't seen a story about Finn having a little brother before so I decided to make one! If you have already tell me and I'll read it! =)

Finn's parents and himself were the only ones who survived the Great Mushroom War. They did this by living in Finn's dad's underground laboratory and/or study. It is buried miles under the Earth's surface. When they have no more food left, his dad would go out and hunt for some, usually rabbits for stew. But one time, when Finn was around one year old, his dad came out but saw the strange change the war did to nature. There were no more animals, at least that's what he thought, until he came by a bunch of talking frog people who live in a swamp. He could no longer find not-talking and not-mutant creatures to feed on. And since the war was over, it was safe for them to go outside and life a new life. But it took some time to get used to this strange new environment.

The reason Finn was left on the leaf is because his mother got kidnapped by Ice King, thinking she was an, AHEM, princess. She dropped Finn on the ground, and luckily, he landed on the soft leaf and was not awakened. His father went out to look for his mother when he found out Ice King had accidentally dropped his wife on a rocky ravine. ("Let me go!" she said, struggling. "Alright, if that's what'll make you happy." Ice King said and let her go. But he was hovering above a you-know-what, and that was the end of Finn's mother.) He got so upset that he went crazy insane. (Sad that he forgot about Finn.)

But one day he met a woman, a HUMAN (AHEM, I bet you know who THAT is.) that looked so much like her wife. She was lovely. Her name is Susan Strong.

(A/N: I know, in my other story Susan wasn't human, but take note of this: My stories aren't related to each other unless I tell you so. And read on, you'll find that I added a TWIST.)

After six years they had a son, who looked like a little version of Finn. They named him Pen.

But Pen was kidnapped by assassins. So Susan and Arnold (Finn and Pen's dad) looked for him, and during the process, Arnold remembers his first child, Finn. He swore he would find him after he finds Pen. But they were attacked by Lub Glubs, resulting his death and Susan's forgetting about everything from her past life. Then Susan became a Hyooman, because she was bitten by one.

But what happened to Pen?

So, that's just the intro! I've tried hard to make it sound interesting, but. Anyway, tell me if you like it or not! Enjoy =)

Please review!