Friendship and self - discovery are themes that often show up as well. Finn could be part of a group of friends going through various challenges together, and in the process, he discovers more about himself, his strengths, and his weaknesses. This type of story can be very relatable and engaging for readers.
One common theme is adventure. Fans often write about Finn and Jack going on exciting journeys, like exploring uncharted islands or trekking through dangerous jungles.
One popular finn harries and jack harries fanfiction is 'The Harries Brothers' Adventure'. It takes them on a fictional journey through different countries where they solve mysteries and have exciting encounters.
One common theme could be family dynamics. Since it involves their sister, exploring the relationships within the family, like how she interacts with Jack and Finn, might be a big part. For example, a story could be about her getting involved in one of their projects and how that affects their family bond.
You can try fanfiction websites like Archive of Our Own (AO3). It has a large collection of fan - created works, and there's a good chance you'll find Finn Harries fanfiction there. Just use the search function on the site.
I'm not sure specifically about Finn and Jack Harries gay fanfic. However, fanfic in general can be found on various fanfiction platforms. You might want to check websites like Archive of Our Own (AO3). They have a wide range of fan - created works, but it may take some searching to find something related to Finn and Jack Harries in that context.
Another option is to look at the related videos on YouTube. Sometimes, fanfic writers promote their works through video descriptions or even make videos about their fanfics. Although it might take some time to sift through, it could lead you to a great fanfic about Jack and Finn Harries' sister. Also, don't forget to check the comments section as fans might be discussing other fanfics there as well.
Another common theme is Finn's relationships. This includes his friendship with Rey, Poe, and others. There are fanfictions that focus on the development of these relationships, like how they support each other during tough times or how their bond grows stronger over time. Some also explore the possibility of a romantic relationship between Finn and other characters.
Tumblr can also be a source. There are many fanfic communities on Tumblr. You can search for Finn and Jack Harries fanfic tags. However, Tumblr's search function isn't always perfect, so you might need to dig a bit deeper by exploring different blogs related to the two. Also, be cautious as the content quality can be inconsistent.
Some fanfictions focus on an alternate universe where Rachel and Finn are in different high school cliques. But they are drawn to each other because of their shared love for music. They secretly start a band together and their relationship blossoms from there.
One popular Finn and Marceline fanfiction is 'The Adventure Beyond Time'. It takes the two characters on a journey through different time periods in the Land of Ooo. Another is 'Finn and Marceline's Musical Bond' which focuses on their shared love for music and how it deepens their friendship. And 'The Mysterious Encounter' where they team up to solve a strange mystery in the forest.