▻The Lost Prince (Adventure Time X Male Reader) [mostly Finn x Reader]◅

Chapter 5: Many things

M/n didn't know what happen. He was shocked when he was singing and all of sudden his clothes were changed to a royalty kind.
"How can this happen?! Last time i recalled people can't change outfits when singing" Bubblegum said as she was trying to figure how how it could happen
"Maybe if he sings again it might work?"
Marceline suggested
"That might work... m/n can you sing us a song?" PB asked asked
"I can try" m/n mumbled.
With a deep breath he started to sing a random song in his head

(If you know BTS then you might know this boy)
M/n singed with true mean but while he was singing he got a memory.
A boy who had blond hair and blue eyes. He looked just like Finn but wasn't but m/n saw that the man was well known by his 'royalty' self and were laughing. They were laughing and chatting around when all of sudden they kissed. Did m/n already had a secret lover? But what about the princess who m/n was about to be married with? M/n now had questions but he didn't know anyone who could help me answer them. The man then held m/n closed but later that memory faded.
"M/n! Are you okay?!... you're crying" Finn said with sadness overtaking him.
M/n saw a tear fall and smiles at Finn
"I am fine... but i remember... a little" M/n managed to say.

M/n told them about the princess who he was about to get married and the man that he kissed.
"It seems you're a prince... but what type of prince are you?" PB asked
"Oh what if you are a mysterious prince" Marceline said
"Yeah! We never seen you, you're a prince, you sing really and i mean really good, you are handsome looking, you are still young... well.. look young, have a great voice, any girl or boy can fall in love with you, have a feminine body-" Jake was then cut off by Finn elbowing him
"Aham! What Jake is saying that you look perfect to be known or titled as the Mysterious prince" Finn said
M/n nodded
"So is my title The Mysterious Prince?" M/n asked
"It would make since since we aren't sure what you are" PB replied
M/n nodded and stood up.
"Finn i remember a lake and inside that lake it had a new world in it.. maybe if i go there i might find something that might represent me and who i truly was "
m/n said as he looked at Finn with hopeful eyes
"We can try going there... Jake stay here so if Any princess gets kidnapped by ice king then you can stop him if I'm not here" Finn said
"Or maybe you just want to be with m/n and take him all to yourself" Jake mumbled
Finn blushed but took m/n out of the candy castle.
The adventure started, but what was m/b gonna go through or what will they find out?...

To be continued?

(I honestly don't know if this is a good story for you guys if any suggestions or anything like adding an oc or something then tell me because my brain is out of ideas)