One possible plotline could be that Harry has done something dangerous in the wizarding world, like sneaking into the Forbidden Forest without permission. Sirius, as his godfather, decides to give him a mild spanking as a form of discipline while also explaining why his actions were wrong and how they could have put him in great danger.
Maybe Harry has been misbehaving at Hogwarts, getting into too many fights or not doing his schoolwork. Sirius steps in and uses a spanking as a last resort after trying other methods of getting Harry to behave. The story could then focus on how Harry realizes his mistakes and starts to improve, with Sirius guiding him along the way. In this plotline, it's all about the growth and learning of Harry under Sirius' care. Another idea could be that Harry has been disrespectful to the wizarding traditions or to the older wizards. Sirius, being from an old wizarding family, feels the need to correct Harry's attitude. He gives Harry a spanking as a symbol of the seriousness of the situation and then educates him on the importance of respecting the wizarding ways. This would show the cultural aspect of the Harry Potter universe and how Sirius is trying to instill the right values in Harry.
A plotline could involve Harry being influenced by some dark magic or bad company at Hogwarts. Sirius discovers this and, in a moment of paternal instinct, spanks Harry to get his attention and make him understand the gravity of the situation. After that, Sirius helps Harry break free from the bad influence, perhaps by teaching him more powerful defensive magic or by introducing him to positive role models within the wizarding community. This would be a story of redemption and protection, with the spanking being a starting point for Harry's journey back to the right path.
One possible scenario could be that Sirius Black spanks Harry as a form of discipline for some dangerous or disobedient behavior that Harry has engaged in within the context of the fanfiction's plot.
Perhaps a plotline where Sirius Black discovers a hidden prophecy related to Harry Potter that requires Harry to submit to Sirius in a series of magical trials. These trials could be designed to unlock Harry's true potential. Or it could be a plotline where the wizarding world is in chaos, and Sirius, with his knowledge and experience, convinces Harry that submitting to his leadership is the only way to restore order. This could involve Harry following Sirius' orders in battles, in diplomatic relations with other magical creatures, and in reforming the Ministry of Magic.
One possible theme could be discipline within their friendship. Maybe in the context of the fanfiction, Sirius has done something that James feels requires a form of reprimand in this rather unorthodox way.
One possible plotline could be that Harry breaks a major Hogwarts rule, like sneaking into the Forbidden Forest. Snape catches him and decides that a severe punishment is in order, which in this case is spanking. Another could be that Harry fails a very important Potions test repeatedly, and Snape, frustrated with his lack of progress, resorts to this extreme form of discipline. However, these are all just fan - created ideas and not part of the official story.
One common plotline is Sirius Black escaping from Azkaban earlier and secretly training Harry in advanced magic. Another could be Sirius and Harry going on a hidden adventure to uncover more about Harry's parents. There are also stories where Sirius plays a more active role in the fight against Voldemort at Hogwarts, using his knowledge of the Dark Arts and his Animagus form to their advantage.
One possible plotline could be that Sirius Black has been under some dark magic influence. Maybe a powerful dark wizard has managed to manipulate his mind, making him believe Harry Potter is a threat to him or the wizarding world in some false way. This could lead to a series of events where Harry tries to prove his innocence and figure out what's wrong with Sirius. Another could be that there's a misunderstanding based on some prophecy or false information spread within the wizarding community. Sirius, being impulsive, jumps to conclusions and decides to disown Harry without fully understanding the situation.
One interesting plotline could be how Sirius helps Harry discover more about his parents in a more personal way. Since Sirius was James Potter's best friend, he could share countless stories and memories that Harry never knew. Another plotline might involve Sirius teaching Harry some advanced magic that he wouldn't learn at Hogwarts. This could give Harry an edge in dealing with the various threats he faces. Also, their relationship could be explored in depth, showing how Sirius becomes not just a guardian but also a true father figure to Harry.
Yes, there might be some fanfiction with this theme that is written in a non - offensive and family - friendly way. It could focus on Sirius Black disciplining Harry Potter in a more light - hearted or mentoring - type of situation rather than anything inappropriate.
One possible reason could be a misunderstanding. Maybe some false information was spread about Harry that made Sirius believe he had done something unforgivable. For example, if there were rumors that Harry was involved with dark magic in some way, Sirius, who has a strong aversion to the dark side, might be quick to disown him.
Well, perhaps the fanfiction could start with Harry finding an old family heirloom or a mysterious spell that transforms him into Warlock Black. Then, he might have to keep this a secret from his friends at first. As the story progresses, he could find that being Warlock Black gives him access to ancient magic that the Dark Lord is also after. So he has to race against Voldemort to master this magic and use it for good. Also, his relationships with the members of the Black family, both the good and the bad ones, could be a major part of the plot.