Yes. The kiss between Natsu and Lucy is a pivotal moment that adds depth to their relationship in the manga. It comes as a surprise to many but is a welcome development for their love story.
The kiss could also complicate things. Maybe they both have different ideas about what the kiss means. Lucy might think it's a start of a serious relationship, while Lockwood just saw it as a spur - of - the - moment thing. This can lead to some misunderstandings and tension between them.
There are definitely some out there. One tip is to look for fanfictions that have high ratings and a lot of reviews. These are often indicators of well - written stories. Also, consider joining fanfiction communities related to the source material of Desmond and Lucy. Members there can recommend some great fanfictions with their kiss as a central or important part.
Yes, there are likely fanfictions with this concept. Naruto and Lucy are from different anime/manga universes, which makes for an interesting crossover in fanfiction. Some might explore a romantic relationship between them in unique and creative ways. For example, they could meet in a strange alternate dimension where their worlds collide, leading to that kiss. It really depends on the creativity of the fanfiction writer.