Fionnathehuman Stories

The Ice Queen, ruler of the ice kingdom, has been known to be a rather crazy yet powerful individual. But more importantly... lonely. So lonely in fact, that she resorts...

Accidentally (?) turned into a vampire, the reader has had no choice but to adapt to Marshall Lee's lifestyle. But his lifestyle had taken an abrupt turn into that of so...

Marceline has never heard of Bad Little Boy, a singer that all her friends know. Until they spot a flyer saying he was going to be in Ooo. At the concert they bump into...

When Princess Y/N is scheduled to go to the Candy Kingdom for a royal dinner, she meets Marshall Lee the vampire king and Prince Gumball of the Candy kingdom. She was on...

Just a bunch of mini-stories about the two idiots, ranging from very cute fluff and extreme angst. I hope you enjoy!! Warning: some stories may or may not have trigg...

Royal Bubba Princeton, nicknamed Gumball because of his love for candy, is President of the student council, enjoys home economics, is part of the Science Club, Chess Cl...

[𝙉𝙖𝙢𝙚] [𝙇𝙖𝙨𝙩 𝙣𝙖𝙢𝙚] 𝙒𝙖𝙨 𝙟𝙪𝙨𝙩 𝙣𝙤𝙩𝙝𝙞𝙣𝙜 𝙗𝙪𝙩 𝙖 𝙝𝙪𝙢𝙗𝙡𝙚 𝙁𝙧𝙖𝙣𝙠𝙞𝙣𝙨𝙩𝙞𝙣𝙚 𝙬𝙖𝙣𝙙𝙚𝙧𝙞𝙣𝙜 𝙩𝙝𝙚𝙞𝙧 𝙙𝙚𝙨𝙤𝙡𝙖𝙩𝙚 𝙡@𝙣𝙙 𝙪𝙣...

✴ The title explains it all, one shots about Simon!! I can do requests too but most of them are going to be things that I come up with on my own! (Simon Petrikov x read...

In the land of OOO, there tells a tale of Three hero's that help take down evil and fight Monsters and all that sort of junk. These heroes are. Fionna the human: one of...

Adventure time fanfic I guess! They did winter king dirty by only giving him one episode >:( maybe they'll give more in future but for now I'll write my own story on...

Husband (Y/n) X Pregnant Wife Ice Queen (Y/n) knew that when ever Ice Queen is defeated by Fionna and Cake She comes back and kidnaps again. again and again and again an...

When a bubbly prince falls in love with a dangerous vampire king he'll finally find out that love really does BITE. (GUMLEE/MARBALL)

It's a sunny day in the land of Ooo, and you and your robotic friend, Roberto, are going to meet two folks that will change your lives. Like halfway through the story I...

Things are tense in the hot, wasteland dimension. Tempers are high, and Fionna is overwhelmed with guilt after being screamed at by a furious Cake. Simon takes matters i...

These are sort of Gumball and Marshall Lee oneshots, though they all connect. Most of them just have a long time skip in between them, as they're all in the same univers...

(adventure time ♡ gn! reader) After a couple of months, you grew tired of living in fear underground. You decided to venture out to the outside world and have many new e...

☆ In the Land of Ooo, Simon Petrikov seeks to heal from the loss of Betty. With the reader's support and understanding, they share a heartfelt conversation, leading Simo...

After a horrible accident Fiona is thrust into a new world with new people, except she's known these people all of her life. Her life turns upside down as she tries to r...

"𝐦𝐲 𝐮𝐧𝐝𝐲𝐢𝐧𝐠 𝐥𝐨𝐯𝐞, 𝐧𝐨𝐰 𝐈 𝐡𝐨𝐥𝐝 𝐢𝐭 𝐥𝐢𝐤𝐞 𝐚 𝐠𝐫𝐮𝐝𝐠𝐞." "𝐚𝐧𝐝 𝐢 𝐡𝐞𝐚𝐫 𝐲𝐨𝐮𝐫 𝐯𝐨𝐢𝐜𝐞 𝐞𝐯𝐞𝐫𝐲 𝐭𝐢𝐦𝐞 𝐭𝐡𝐚𝐭 𝐢...