Fanfiction.net also has Setosolace fanfiction. Although it has a mix of different types of stories, you can usually find non - explicit ones by reading the summaries and reviews. Look for stories that focus on the emotional connection between the characters or their adventures together rather than any inappropriate themes. It may take a bit more time to sift through, but there are definitely some good ones there.
Archive of Our Own (AO3) is a great place to start. It has a vast collection of fanfiction, and you can use the search and filter options to specifically look for Setosolace fanfiction that is free from inappropriate content. Just type in 'Setosolace' in the search bar and then filter the results based on your preferences, like rating, word count, etc.