There could be a fanfiction where Superboy and Supergirl are in an alternate universe. In this universe, they are not related as in the traditional stories. They meet at a superhero gathering and the kiss happens spontaneously, leading to a whole new relationship dynamic.
People write it because they like to explore different relationship dynamics. Superboy and Supergirl are both powerful characters, and seeing them in a romantic relationship can be exciting.
One popular story might be about their adventures together in an alternate universe where they have to team up against a powerful new villain. In this fanfiction, their powers combine in unique ways to defeat the foe.
Fanfictions that focus on their family relationships could also be great. Maybe stories about how they interact with their Kryptonian heritage within the context of the modern world. They could be exploring old Kryptonian traditions while also dealing with the challenges of living on Earth, which can be a really interesting mix of the old and the new for them.
One idea could be that they team up to face a new and powerful villain from another dimension. This villain has the ability to nullify their powers temporarily, so they have to rely on their wits and non - superhuman skills. Another plot could be that they discover a long - lost Kryptonian artifact that holds the key to saving Earth from a natural disaster, but they have to solve a series of complex puzzles to unlock its power. Or perhaps they meet in a situation where they initially don't recognize each other as Superboy and Supergirl, and there's some humorous misunderstandings before they figure it out.
One interesting storyline could be Superboy and Supergirl teaming up to face a new and powerful villain that the Justice League has overlooked. They might discover a hidden threat in Smallville that has ties to Krypton's past.
One popular story could be 'A Moment of Connection'. In this fic, their kiss might be a result of a deep emotional bond formed during a tough battle. It shows how their relationship evolves from just being teammates to something more intimate.
You can try some well - known fanfiction websites like Archive of Our Own (AO3). It has a large collection of fan - created stories, and you might be able to find some Superboy and Supergirl fanfictions there. Just make sure to use the search function properly.
Lex Luthor could be a great antagonist. He could be jealous of their combined power and try to create a device that can split them up or weaken their powers. He might also try to turn the public against them by framing them for crimes they didn't commit.
One great 'oc and supergirl fanfiction' is 'The New Ally'. It's about an OC with unique powers who teams up with Supergirl to save the city from a powerful alien threat. The OC has telekinetic abilities and their interactions with Supergirl are really interesting.
There are definitely some. One interesting aspect of these fanfictions could be how they handle the characters' existing relationships in the Supergirl universe. Some might rewrite the canon in a way that makes the Kara - Alex kiss more believable within the context of the show. Others might create an alternate universe where different rules apply. So, exploring different fanfictions can give you a wide range of interpretations of this relationship.