Another theme is the idea of redemption and second chances. Given their complex pasts in the Harry Potter world, fanfictions often play with the concept of them finding new beginnings with each other. For example, Sirius' escape from Azkaban and Remus' struggle with his werewolf nature can be elements that are worked into their relationship development in these stories.
The theme of secrecy and forbidden love also pops up often. In the wizarding world, their relationship might face various challenges due to social norms or their own personal issues. Fanfictions may delve into how they deal with hiding their relationship from others, like their friends in the Order of the Phoenix or the Hogwarts students, and the internal and external conflicts that arise from it.
One common theme is loyalty. Their long - standing friendship forms the basis of their relationship in these fanfictions. Another theme is the struggle with their identities, both as werewolves (in Remus' case) and as outcasts in the wizarding world for different reasons. Their relationship often becomes a source of comfort in the face of such difficulties.
Well, there's the theme of adventure. They were part of the Marauders after all. Fanfictions often send them on new adventures, whether it's exploring a new part of the wizarding world or solving a mystery. Then there's the theme of sacrifice. They are willing to sacrifice for each other. This can be seen in many stories where one puts himself in danger to save the other. And the theme of love - not necessarily romantic love, but a deep, platonic love that is very strong between them.
A common theme in these fanfictions is the idea of redemption. Sirius, who was wrongly accused, often has his journey of proving his innocence explored. And for Remus, his struggle with his identity as a werewolf and finding acceptance is a big theme. There are also fics that focus on their relationship in the context of the First Wizarding War. How they fought together, the sacrifices they made, and how their friendship endured through the chaos and danger of the war.
One common theme is loyalty. Their loyalty to each other is often explored deeply, as they've been through so much together. For example, in many fics, they stand by each other through difficult times at Hogwarts and later in life.
Love and support are very common themes. Since the situation is quite unique, showing how Sirius and Remus support each other through the pregnancy is often a central part. Another theme is acceptance, as they have to accept this new reality in their relationship.
One common theme is loyalty. Given their long - standing friendship, loyalty is a big part of their relationship in fanfiction. They are always there for each other through thick and thin, whether it's dealing with the wizarding world's threats or personal demons.
Common themes might include the exploration of their complex relationship. Since they are friends in the original story, fanfiction could delve into how that friendship turns into something more intimate. Also, themes of trust and loyalty are likely to be present.
Love, both platonic and sometimes romantic, is also a major theme. Their relationship had a special connection, and fanfics might show how that connection could develop into something more. It's about the unspoken feelings they might have had for each other.
One popular 'Sirius Black and Remus Lupin slash fanfiction' is 'All the Young Dudes'. It delves deep into their relationship, exploring their friendship and the underlying romantic tension in a really engaging way. The characterizations are on point, staying true to the original Potterverse while adding new dimensions to their bond.
Fanfiction.net is also a place to look. There are many works related to different fandoms. However, the tagging system might be a bit different from AO3. You need to search carefully for the specific relationship between Remus Lupin and Sirius Black that you are interested in. For example, you can try different combinations of their names in the search bar.