You can start by looking on fanfiction websites such as Archive of Our Own (AO3). It has a large collection of fan - created works, and you can easily search for 'gokudera x tsuna fanfiction' using the search bar.
Some dedicated anime or manga forums also have sections for fanfiction. You can join these forums, look for the relevant sections, and see if there are any 'gokudera x tsuna' fanfics shared by the members. This way, you might also be able to interact with other fans who are interested in the same pairing.
Another place could be FanFiction.net. There are many different categories of fanfiction there, and you might be able to find some interesting 'gokudera x tsuna' stories. Just make sure to use the right search terms.
You can try looking on Archive of Our Own (AO3). It has a large collection of fanfictions across various fandoms, including Tsuna x Gokudera yaoi ones. Just use the search function and type in the relevant tags.
One popular type of 'gokudera x tsuna fanfiction' might be adventure - themed ones. They could involve the two characters going on a dangerous mission together, relying on each other's skills. For example, in some stories, Gokudera's explosive skills and Tsuna's leadership combine to defeat a powerful enemy.
One popular Gokudera x Tsuna yaoi fanfiction is 'The Unspoken Bond'. It delves deep into their relationship, exploring the unspoken feelings between them. The author does a great job of portraying their personalities in a way that makes their relationship development seem natural within the context of the story.
Well, for one, the characters are already well - loved from the original source. Fans like to explore different relationship possibilities for them. And the yaoi aspect adds a layer of forbidden or secretive love, which is often very alluring. The idea of Gokudera and Tsuna having a romantic relationship that they might have to hide or struggle with due to various reasons in the story world is a big draw for many fans of this type of fanfiction.
Another option is to check out some niche anime - related fanfiction communities or forums. Sometimes, fans share their own works or recommend good alaude x tsuna fanfictions within these smaller, more dedicated groups.
Another place to search is FanFiction.net. There are many different categories and fandoms represented there. Just use the search function and type in 'tsuna x haru' to see what comes up. However, the quality of the stories can vary widely, so you may need to sift through some to find the really good ones.
You can try fanfiction.net. It has a large collection of various fanfictions, including tsuna x yamamoto ones. Just use the search bar and type in the relevant keywords, and you'll get a list of stories.
Overcoming challenges together is also a frequent theme. Since they are often in difficult situations in the original story, in the yaoi fanfictions, they might face challenges that test their relationship, such as rivalries or threats from other characters. And through these, their bond deepens. For example, they could be facing a new enemy in the underworld who is trying to break them apart, but they hold on to each other and come out stronger.
Fanfiction.net is also a good place to look. There are many authors who contribute to the Hibari x Tsuna category. However, you need to be a bit patient while searching through the numerous stories to find the ones that suit your taste.
Archive of Our Own (AO3) is a good place to start. It has a wide range of fanfiction, including different pairings and themes. Another option could be FanFiction.net, though the content there might be a bit more scattered.