Perhaps it could be a part of a role - playing scenario within the fanfic. In a magical academy play or something similar, Draco and Harry are assigned roles where Draco has to spank Harry as part of the script. This could lead to a lot of humorous situations and also a deeper exploration of their characters' relationship.
One possible plotline could be a story of redemption. Maybe Draco spanks Harry as a form of discipline in a situation where Harry has made a serious mistake that endangers others in their wizarding world. This could lead to Harry reflecting on his actions and growing as a person.
I'm not sure if there is an existing 'Harry Spanks Draco' fanfic. Fanfics cover a wide range of themes and pairings, but this particular one might be quite rare or not widely known. You could try searching on popular fanfic websites like Archive of Our Own or Fanfiction.net, but be aware that such a title might also imply non - consensual or inappropriate content which is not acceptable in many communities.
Another plotline could involve the challenges they face due to their different backgrounds. Harry being a Gryffindor and Draco a Slytherin, their houses have long - standing rivalries. They would need to overcome these differences and the prejudices of their fellow students.
One possible plotline could be Draco secretly protecting Harry from dark wizards without Harry knowing. For example, he might use his knowledge of the Death Eaters' plans to foil their attempts on Harry's life.
A 'Harry Spanks Draco' fanfic would probably be about a very specific and perhaps rather unorthodox relationship between Harry and Draco. It could potentially explore a power dynamic where Harry is in a position of authority over Draco in some fictional scenario. However, this is just speculation as it's a rather unusual concept for a fanfic.
The spanking could be a turning point. It could be a catalyst for them to start communicating more openly. Maybe Draco spanks Harry as a way to get his attention because he has something important to tell Harry about a threat in the wizarding world. This leads to a series of interactions where they gradually build trust and respect for each other.
One interesting plotline could be that they discover their twin relationship early on and try to keep it a secret from everyone at Hogwarts. They might secretly help each other out in classes and with their rivalries against other houses.
A great plotline might involve a magical competition where Draco, Blaise, and Harry are all forced to compete. As they face various challenges, they start to understand each other better. For example, they realize that they all have the same fears about the future of the wizarding world. It could also be a plotline where they are all transported to an alternate dimension and have to rely on each other to get back home.
One interesting plotline could be Harry and Draco being deaged and having to rely on each other in a world that seems new to them again. They might form an unexpected friendship as they don't have the pre - conceived notions from their older selves. For example, they could team up to solve a mystery in Hogwarts that only they, with their combined knowledge from before, can figure out.
Well, in some 'Draco Adopts Harry' fanfictions, a great plotline is how Draco overcomes his past enmity towards Harry. He starts to see Harry as a person in need rather than an enemy. There could be a plot where they work together to uncover secrets about Harry's past that Dumbledore might have hidden. And then, Draco has to protect Harry from those who don't want the truth to come out.
One common plotline is a magical duel over a school competition. Maybe it's for the House Cup, and their fight gets intense as they both use their unique spells. For example, Harry might use his Patronus charm while Draco counters with some dark - arts - inspired hexes.