One interesting fanfiction could be where Sirius Black uses the dog house as a secret hiding place from the Ministry. He might transform into his dog form and stay there when he feels threatened. Another could involve him reminiscing about his time as a dog while sitting near the dog house at Grimmauld Place.
A fanfiction could also center around Sirius Black's relationship with the dog house as a symbol of his outcast status. He might decorate it in a way that shows his defiance against the pure - blood norms. The dog house could be a place where he finds solace and plots his ways to protect Harry Potter, all while being in the form of a dog or just using the dog house as his thinking spot.
There's a fanfiction called 'Regulus's Redemption'. In this, it focuses on Regulus's journey after he realizes the true nature of the Death Eaters. It also weaves in Sirius's attempts to save his brother, despite their estrangement. It's a great read as it shows the complex emotions between the two brothers.
One interesting Sirius Black godfather fanfiction is 'The Black Heir'. It delves into Sirius's role as a godfather in a unique way, exploring his relationship with Harry in a more in - depth and alternative universe setting.
There could be a fanfiction that delves into the magical afterlife concept in relation to Sirius Black's death. It could be about his spirit lingering in a limbo state, trying to communicate with the living. This would add a new dimension to the story, as it might involve some new magical elements and how the wizarding world deals with spirits and the afterlife.
One interesting Black Dog fanfiction could be about its origin story. Maybe it delves into how the Black Dog came to be, its early encounters and what made it the way it is in the original work. Another could be a fanfiction that has the Black Dog teaming up with an unlikely character, creating a unique and exciting adventure.
Well, 'Sirius and the Younger Heart' is a fanfiction that stands out. It begins with the two characters being very aware of the age gap, which causes some initial awkwardness. But as the story progresses, they learn from each other. The younger character brings a fresh outlook, while Sirius offers his wisdom. And then there's 'The Gap that Binds' which is all about how the age gap, rather than being a hindrance, becomes a strength in their relationship as they face various challenges together.
One interesting fanfiction could be about Sirius Black secretly training Harry Potter in advanced magic during his time at Hogwarts. This would add a whole new dimension to their relationship and Harry's growth as a wizard.
One interesting Sirius Black as a Death Eater fanfiction could be 'The Darkened Path of Sirius'. In this story, Sirius might be forced into the Death Eater ranks due to some dark family secrets. Another could be 'Sirius's Fall and Redemption'. It might explore how being a Death Eater changes him and his journey back to the good side. And 'The Alternative Sirius' could show a world where Sirius is a Death Eater from the start, changing the whole dynamic of the Harry Potter universe.
One interesting plotline could be a mystery - solving one. Harry discovers some strange artifacts in Grimmauld Place that were left by Regulus. With Sirius (if he's alive in the fic), they try to figure out what these artifacts mean and it leads them to uncover a long - forgotten plot by Voldemort. Another plotline could be a redemption arc for Regulus. Harry, after learning about Regulus's attempts to undermine Voldemort, tries to clear his name in the wizarding world, which causes some friction with those who still see the Black family as mostly dark wizards. And there could be a plotline about family secrets. Sirius and Harry find out that there are hidden magical abilities in the Black family bloodline that only Regulus knew about, and they have to figure out how to use or control them.
I'm not sure of a specific one titled exactly like that, but there might be some on fanfiction.net. You can search for tags like 'Sirius Black' and 'dog house' to find relevant stories. Usually, stories that explore Sirius's time as a dog and his connection to a particular place like a dog house can be really engaging.
One popular fanfiction might be 'The Forbidden Love of Walburga and Sirius' which delves into a complex relationship where Walburga's love for Sirius is a hidden and tortured one. It shows how her love battles with the strict pure - blood values she has been raised with.