Well, in some fanfictions, Jack and Yusei might be in a situation where they have to protect their city from an alien invasion. They combine their powers and knowledge, and during this process, their relationship evolves. It could start as a professional partnership but slowly turn into a more emotional and personal connection. Or perhaps there is a fanfiction where they get transported to a different dimension and have to find their way back while dealing with all kinds of strange creatures and challenges, which brings them closer together.
Fanfiction.net is also a good place to look. There are many different categories and you can navigate to the relevant section for the fandom. However, the quality may vary, so you'll need to read the reviews or summaries to find the better ones. Also, some Tumblr blogs might be dedicated to sharing or creating Jack and Yusei fanfiction, so it's worth exploring Tumblr as well.
A 'yusei x jack fanfic' could be about a deep friendship between Yusei and Jack. It might explore their adventures together, how they support each other through tough times. For example, they could be facing challenges in a racing competition, and their bond helps them overcome difficulties.
A common theme is rivalry. Yusei and Jack have a long - standing competitive relationship, and this is often explored in fanfiction. Another theme is friendship. Despite their differences, they can come to respect and care for each other.
Yes, there are quite a few. You can check out some fanfiction websites like FanFiction.net. There you might find various stories exploring the relationship between Jack and Yusei in different ways, from deep friendships to more complex emotional bonds.
Growth is another theme. Both Jack and Yusei are characters who have grown throughout the series, and fanfictions often continue this growth arc, showing how their relationship affects their individual development, like how they learn from each other's strengths and weaknesses.
One possible fanfiction could be about Yusei and Jack's early days in the Satellite. Maybe it could explore how their friendship or rivalry began. They might have started as two young duelists trying to make a name for themselves in the rough environment of the Satellite.
Since 'lemon' usually implies a more mature or romantic theme, a common theme could be their romantic relationship. It might explore their first kiss, for example.
Often, there are themes of emotional connection between Yusei and Aki. The fanfiction might explore how they support each other through difficult times, and then build on that with the 'lemon' aspect which adds a layer of physical and sexual tension. Another theme could be the growth of their characters within the relationship, as they face challenges together and become closer both emotionally and physically.