All was peaceful in the land of Ooo. Just recently, the whole continent was united under the banner of the United Candy Kingdom (UCK) and the Georgian Calendar was re-instated. The year was 3013, and Finn was still a teen. Even though new advancements and the re-introduction of prewar practices started to take off, all was almost the same for Finn. Same bland adventures with Jake, saving PB from the Crazy Ice King, and hanging out at Marceline's. There was one major change, humans started to migrate to the UCK, the Candy Kingdom was a land of opportunity for the hard working, and hungry humans. Finns mental chemistry changed after being around many humans.

"So Jake, I'm gonna head to Marcy's house for a bit." said Finn

"Sure man, just don't be doing that tier 15 buiss, ok?" said Jake squinting

Finn looked in utter disgust, and blasted out of the tree house.

Finn's Mind

Why does Jake always assume that... it isn't right at all...? Why should I care about what he thinks, I am my own self. However, I have this urge sometimes... I just need to pick up a hammer and... No, I cannot.

"So what's making you think so hard boy?" said Marceline laughing

"Oh, n-nothing important!" yelled Finn while blushing

"Then why don't we do a secret exchange then?" said a wicked Marceline

"W-well ok then, I'd might as well start first" said Finn looking to the ground

"I have this urge sometimes. It happens almost always to anyone, most of the time if they make me mad. I don't know if I can hold it in any longer, it's just-" Finn is interrupted

"Say no more adventure boy, maybe I can help you gain the pleasure you seek," Marceline said calmly while closing her eyes

"I'll record a song and tomorrow I'll see if that calms you down, ok?" Marceline said smiling

"Yeah." Finn said grinning

Night fell as Finn was walking back home. His urges to kill got even stronger with every step he took. He started to pace and smile like a mad man without his medication. He picked up a hammer from a garbage can and concealed it while he paced. A candy person walked up to him. As Finn turned around, he took a violent swing at the hammer and hit the person. The hammer killed the candy person instantly, fracturing his skull.

Finn's pupils dilated and the adrenaline was pumping. He realized that he just killed a person and there was no going back. The righteous paladin had now just murdered an innocent person for no apparent reason, but for pleasure. He casually walked away from the murder scene as if nothing happened.

He knew that the Banana Police would be on the scene the next morning. He needed to create an alibi and get rid of the evidence.

Finn's Mind

Shit! What have I done! I just killed someone... BUT wait... IT FeELs SO GoOD! OK OK, I'll do it again, but I need an alibi so I can continue killing! Hahahaha, this is fun after all huh Finn? BING! All I need to do is go to Marceline, she will sympathize with me and join! She will help!

Finn knocked on Marceline's door late at night while she was recording the song.

"Hey Finn, what's wrong? Said Marceline

"Marcy, I can't put it in any other way, but... I just murdered a person." Finn said in a sad tone

"Finn... It's ok... It... happens, stay here for a bit, and I can help you." Said Marceline calmly

"Thanks Marceline, I knew I could trust you." Finn said smiling

Finn and Marceline spent the whole night formulating an alibi and disposing evidence. They buried the hammer underneath Marcy's house, and changed Finn's clothing to make sure there was no blood or DNA of the victim on him. Finn then called Jake.

"Yo, Jake, Marcy, and I are making a song for the night; I won't be home till afternoon tomorrow." Finn said

"No problem man, you were getting me worried there bud, goodnight!" Jake said with no worries

Finn hangs up and stares at Marceline

"So now what?" Finn said worried

"We just wait until the police come" Marceline said looking down

"Look! I'm sorry Marceline, I didn't want to bring you into this!" said Finn

"Actually Finn. It no problem, I've had the same urge as well, ever since the migration of the humans." Marceline said while smiling

"So we have the same demon inside us?" Finn said while grinning like a mad man

"YeS FiNN, I ThInK We dO!" Marceline yelled happily

"Now Finn, I've been trying to tell you something-"Marceline gets interrupted

Finn kisses Marceline.

"Oh Finn, just wait for a little bit, after the investigators come, then we can have our celebration." Said Marceline

"Yeah Marcy" Finn Smiled

NEXT DAY

Knock Knock

"Hello Marceline and Finn, we were just wondering if you heard or saw any suspicious last night?" said a banana police man

"Nope." both of them said calmly

"Ok, just howler if anything happens"

POLICE POV

"Hmmm, it seems this may have been an accident?" said Honey Buns (Candy Detective)

"Not sure, had to have been an angry person, however there is only one spot that was hit." said the human detective Paul-Jean

"Lets call this case Homicide #132 Accident, make sure to collect all the evidence, and did you talk to the neighboring houses and people guys?" Said Jean

"Yup, no leads, lets hope this guys was a first timer and left something." said Honey Buns