It is highly inappropriate. Such content not only goes against the values that should be upheld in the fan community but can also be considered a form of child exploitation if the characters are minors. Fanfiction should focus on creativity in a positive and respectful way.
One alternative could be writing about their adventures together. For example, they could go on a mission to explore a mysterious land or fight against a new and powerful enemy. This would focus on their skills and cooperation.
No. Writing sexual fanfic involving underage or inappropriate relationships in the Naruto universe is completely unethical and violates the basic principles of respect for the source material and its intended audience, which often includes children and young fans.
In fanfiction, the idea of Boruto and Sarada getting married is quite popular. Many fans like to explore this relationship because they have a unique bond in the Naruto universe. Their personalities, with Boruto being adventurous and Sarada being determined, could make for an interesting married couple in fan - created stories.
As of now, no. In the Boruto series, their relationship is mainly focused on their friendship and comradeship as ninja. There are some moments that fans might interpret as having a hint of something more, but the story has not made their relationship a romantic one in an official capacity.
I really like the fanfic 'Sarada's Ascent'. It shows Sarada facing various challenges in the Hidden Leaf Village. The author does a great job of portraying her determination and growth, making it an exciting read for any Boruto fan.
There may be some well - known fanfics with Boruto and Sarada kissing, but it really depends on which fanfic communities you explore. Some smaller, niche communities might have a fan - favorite that isn't as well - known in the larger Naruto/Boruto fanfic world. It could also be that new fanfics with this theme are constantly being written, so popularity can shift over time.