A cool Adventure Time school fanfiction might involve Marceline enrolling in a music school. Since she's a rocker, she could be teaching other students her unique style of music, or she could be learning new musical techniques from an ancient and mysterious music teacher.
One interesting 'Adventure Time Stories Fanfiction' could be about Finn and Jake going on a quest to a new, uncharted land in Ooo. Maybe they discover a tribe of magical creatures that no one has ever seen before. This could involve them using their usual problem - solving skills and teamwork to overcome challenges.
Perhaps there's a mystery in the high school. Marceline, being the cool and mysterious girl, teams up with Finn to solve it. They discover that there's a secret club in the school that's causing all kinds of strange happenings, like making students' lunches disappear or changing the school's layout at night.
One idea could be a new student arriving at the Jungle School who has a mysterious power. This could cause chaos and also intrigue among the existing students like Finn and Jake. Maybe they have to figure out if this new student is a friend or a foe.
Another plot could involve a new dragon teacher at the school. This dragon teacher has a very different teaching style compared to the others. For example, instead of using books, it teaches magic spells through real - life experiences. The students, including Finn and Jake, are both excited and a bit scared of this new way of learning.
One popular adventure time school harem fanfiction might involve Finn in a school setting with multiple female characters having a crush on him. For example, Princess Bubblegum could be a student in this school, and there could be a whole dynamic of her trying to get Finn's attention among other female characters like Flame Princess also vying for his affection.
There could be a fanfiction where Samantha discovers a hidden part of the Candy Kingdom. She teams up with Princess Bubblegum to explore it. Along the way, they face challenges like strange traps and puzzles. Samantha's unique perspective might lead them to find a long - lost treasure or a new type of candy that has amazing powers.
A great fanfiction could be set around Farmworld Finn's family. Maybe his son gets into trouble by accidentally releasing an ancient evil that was trapped in a forgotten part of the farm. Finn then has to team up with some of the local farmers, who have their own unique skills and powers, to save his son and the farm from this new threat. This would show how the Farmworld community comes together and how Finn has changed as a character in this different world.
One interesting 'Adventure Time Human Fanfiction' could be about Finn growing up in a modern human world and dealing with normal teenage problems while still having memories of Ooo. Another might be about Princess Bubblegum as a human scientist, exploring new frontiers in a human city. And there could also be a story where Jake is a human with a unique shape - shifting ability that he has to hide from the world.
One interesting story could be about Minerva's origin. Maybe she was a lost princess from another dimension and her adventures in the Adventure Time world were all about finding her way back home while making friends with Finn and Jake. Another could be a story where Minerva discovers a hidden power within herself and has to use it to save Ooo from a new, unknown threat.
There could be a lemon fanfiction about Marceline and Princess Bubblegum. For example, it could be set during a time when they are trying to solve a mystery in the Candy Kingdom that has some sort of magical element involved. Their different personalities and powers play off each other in interesting ways throughout the story.