A common theme could be friendship. Given their relationship within their group, fanfics might explore the deep bond of friendship between chuu and yves. Another theme could be adventure, where they embark on some exciting journey together.
Adventure is also a theme. Writers might create scenarios where they embark on an exciting journey, perhaps in a mysterious land, which tests their relationship and individual strengths.
I really like 'Lip Gallagher and the Reader: A New Beginning'. In this fanfic, the author does an amazing job of creating a believable scenario where the reader character enters Lip's chaotic world. It shows how they both grow and change because of each other, and the dialogue is so on - point with Lip's personality.
I'm sorry, I don't have a specific chuu and yves fanfic to recommend directly. But you can try looking on some fanfiction websites like Archive of Our Own (AO3). There are often many fan-written stories about different pairings in the K - pop world, and you might be able to find some great chuu and yves fanfics there.
Some chuu yves fanfics explore the idea of them being in a parallel universe where they are not idols but regular students. It shows a different side of their personalities as they navigate through normal teenage life, with school, friends, and first loves.
Shego and Kim as unlikely allies could mean that they are brought together by fate. Perhaps a powerful artifact is about to be misused, and they are the only two who know how to stop it. Their initial meetings would be full of tension, but as they start to understand each other's motives, they form a tentative bond.
Archive of Our Own (AO3) is a great place to start. It has a large collection of 'lip gallagher x reader fanfic'. You can easily search for it using the relevant tags and filters. Fanfiction.net is also another option, although the tagging system might not be as refined as AO3.
A common theme could be friendship. Given their connection in the original source material, many fanfics might explore how their friendship grows and deepens over time. They might face challenges together and support each other through difficult situations.
One of the common themes is overcoming obstacles. Jack and Kim often face various challenges in the original story, and in fanfic, this can be expanded. They might have to deal with external forces trying to break them apart or internal struggles like jealousy or fear of commitment. Growth is also a theme, as they grow both as individuals and as a couple in these fan - created stories.