Well, it depends on how niche or popular this pairing is in the Naruto fanfiction world. It might be a bit hard to find exactly what you're looking for. You can use the search functions on fanfiction websites, but also consider broadening your search terms a bit. For example, look for stories that involve Sakura and Tsunade in a friendship - related story first, and then see if any of those touch on the futa aspect if that's what you're really interested in.
Archive of Our Own (AO3) is a good place to start. It has a large collection of fanfiction from various fandoms, including Naruto. Just use their search bar and type in 'sakura x tsunade futa' and see what comes up.
Often, in fanfiction involving these characters, there can be themes related to teamwork. Given their roles in the Naruto series, a fanfic might focus on how they work together on a mission. There could also be themes of mentorship, with Tsunade perhaps mentoring Sakura, and how Futa might fit into that dynamic.
I'm not sure of specific Tsunade, Futa, Sakura fanfiction. You can try searching on fanfiction - related websites like Archive of Our Own. They usually have a large collection of fan - created stories about various characters.
Perhaps a story where Tsunade and Naruto are on a mission together in a foreign land. They encounter various challenges and have to rely on each other's strengths. Tsunade's wisdom and experience combined with Naruto's determination and newfound powers could make for an exciting adventure as they face powerful enemies and try to protect the local people.
You can start by looking on popular fanfiction websites like FanFiction.net or Archive of Our Own (AO3). These platforms usually have a large collection of Naruto - related fanfictions, and you might be able to find some specifically about Naruto and Futa Tsunade there.
One popular story might be 'Naruto and Futa Tsunade's Unusual Bond'. It could explore how their unique relationship develops in a world filled with ninja challenges. Another could be 'The Adventure of Naruto and Futa Tsunade' which might involve them going on a quest together and facing various enemies.
The unique pairing. It combines two characters in a way that might not be explored in the original source material. This can lead to fresh and unexpected storylines.
Another theme might be mentorship. Tsunade could be seen as a mentor figure to Naruto, and in these fanfics, their relationship could develop in unique ways that explore different aspects of growth, both for Naruto as a ninja and in their personal relationship. This could include training sessions and emotional exchanges that are more in - depth than in the original series.
One key theme could be the power dynamic. Tsunade being a strong and dominant figure in the Naruto universe, and Naruto in a submissive role can lead to exploring how power is balanced in a relationship. Another theme might be the growth of Naruto in this different kind of relationship. He could learn different aspects of himself as he is in a more submissive position compared to his usual heroic self.