Some fanfictions explore the idea of Sirius Black and Harry going on secret adventures together. Maybe they discover a hidden part of the wizarding world or try to solve an ancient mystery that has been long forgotten. This kind of plotline often involves a lot of action and exploration.
Well, first off, a great place to look for 'Harry Potter wants Sirius Black' fanfiction is Tumblr. There are many blogs dedicated to Harry Potter fan works. Some users share their own fanfiction, and others reblog great pieces they've found. Another option is Wattpad, which has a large collection of fan - made stories. You might have to sift through a bit, but it's worth it. You can use the search function and type in relevant keywords like 'Harry Potter' and 'Sirius Black' to narrow down the results.
One popular story is 'The Unspoken Bond' which delves deep into Harry's longing for Sirius's presence and guidance. Another is 'Sirius's Return' where there are some really interesting plot twists around Harry's desire to have Sirius back. You can find these on Archive of Our Own.
You can try fanfiction websites like Archive of Our Own (AO3). There are tons of fanfictions there about Sirius Black and Harry. Just use the search function to look for relevant stories.
Fanfiction about these three can take many forms. For example, there could be time - travel fics where Harry goes back in time and meets Regulus and Sirius when they were younger. This could lead to all sorts of interesting plot twists, like Harry trying to prevent Regulus from joining the Death Eaters in the first place. Or it could be a fic where Sirius survives and he and Harry explore the secrets of the Black family together, including things that Regulus left behind. There are also fics that focus on the emotional bonds between the characters, showing how the different personalities of Regulus, Sirius, and Harry interact and influence each other.
It could develop in a complex way. The spanking incident might initially create tension between them. Harry could be angry or resentful towards Sirius at first.
One possible interpretation could be a very dark and out - of - character exploration. Sirius is a complex character, and this could be seen as a way to show a corrupted or extremely passionate side of him that is not in line with his more heroic portrayals in the original series. For Hermione, it would be a very different kind of relationship dynamic than what she is used to in the books. However, this is a rather extreme and often inappropriate interpretation.
Another aspect of this fanfiction could be that Harry uses his Parseltongue ability to communicate with the snakes in Azkaban (if there are any). The snakes might have some information about Sirius since they can sense the emotions and secrets of the prisoners. Through this unique method, Harry gets closer to proving Sirius's innocence.
Perhaps in the fanfiction, Sirius is mad at Harry because Harry has befriended someone Sirius doesn't trust. Sirius, being protective of Harry, might see this new friendship as a threat. He could be worried that this person will lead Harry astray or put him in danger, and his anger towards Harry stems from his concern for Harry's well - being.
You can try fanfiction.net. It has a large collection of 'Harry Potter' fanfictions, and you're likely to find ones related to Harry's relationship with Sirius there.