Mystery can also be a common theme. Maybe the 'key' holds some secrets or there are mysterious events that the reader and 'key' need to solve together. Additionally, friendship is often explored. How the reader and 'key' become friends and support each other through different situations.
You can try looking on fanfiction websites such as Archive of Our Own (AO3). It has a large collection of fanfics from various fandoms, and you're likely to find some great key x reader fanfic there. Another option is FanFiction.net, though the content quality can be a bit more variable.
An 'anti x reader fanfic' is a type of fan - created story in the fanfiction world. 'Anti' here might imply a negative or contrary view towards a particular character or relationship. In an 'x reader' context, it's usually about a relationship between a character and the reader. So an 'anti x reader fanfic' could be a story that goes against the typical positive 'x reader' scenarios, perhaps showing a dislike or negative portrayal of the relationship.
To write an engaging Beheeyem x Reader fanfic, first, do your research on Beheeyem. Know its abilities, behavior, and appearance well. Then, create an interesting plot. Maybe the reader meets Beheeyem in a strange situation like in an ancient ruin. Build a strong connection between the reader and Beheeyem. Let their relationship develop gradually over the course of the story.
Typically, the Tokyo Mew Mew characters' traits are central. Their cuteness and their strength as Mew Mews are important. In x Reader Lemon fanfics, there could be a lot of focus on the relationship's progression. Maybe the reader discovers the secret of the Mew Mew characters and they grow closer. The 'lemon' part could involve things like secret glances, blushing moments, and some sweet, tender interactions that are building up to a more romantic or deeper connection.
Another good one is 'The Loki Affair'. It starts with the reader being in a rather ordinary life until Loki enters the scene. It delves into the idea of how Loki's presence disrupts the reader's normalcy and how they both navigate this new relationship. The writing style is very descriptive, making it easy to picture the scenes and feel the emotions of the characters.
One great 'ellie x reader fanfic' to start with could be 'A New Beginning'. It has a really engaging plot where Ellie and the reader meet in a post - apocalyptic setting. The author does a wonderful job of building their relationship gradually, starting from distrust to a deep bond.
Well, a Kuroshitsuji Sebastian x Reader fanfic often explores the relationship between the reader and Sebastian. It can range from romantic encounters to adventures they might have together. The allure of Sebastian's character, with his dark charm and loyalty to Ciel, makes for an interesting dynamic when paired with an original reader - inserted character.
I really like the 'wandanat x reader fanfic' titled 'Unexpected Bonds'. It has a unique plot where the reader is a new addition to the Avengers and forms a special bond with Wanda and Natasha. The story is full of emotional moments and great dialogues.
One great 'Momonga x Reader' fanfic is 'A New World with Momonga'. It beautifully depicts the relationship between the reader and Momonga in a fantasy world filled with magic and adventure. The writer does an amazing job of building the connection between the two characters.