A plotline could also be centered around a confession related to a secret they both share. For example, they might be involved in a mystery that only they know parts of. Harry confesses to Draco about his knowledge of this mystery in order to gain his trust and work together. This confession could be the turning point in their relationship from being adversaries to partners in solving the mystery.
Another plotline could involve Harry confessing romantic feelings. It could start with Harry being confused by his own emotions. He might see Draco in a new light, perhaps after Draco does something selfless. Harry's confession could then send Draco into a spiral of confusion as he has to reevaluate his own feelings towards Harry, which he had always thought were of hatred. They would then have to navigate a world where their relationship is completely different from what was expected.
One possible plotline could be that Harry confesses his long - hidden feelings of friendship. Maybe after years of rivalry, he realizes Draco has a different side and he wants to start anew. He might confess in a moment of great danger, like when they are both facing a common enemy. This confession could lead to an uneasy alliance at first, as Draco is shocked but then slowly warms up to the idea of a real friendship with Harry.
Maybe in this fanfiction, they are raised together and form a pact to end the long - standing feud between Gryffindor and Slytherin houses in Hogwarts. They work towards bringing unity among the students through various magical projects and initiatives.
Well, a possible plotline is that they grow up and realize they have a shared passion for a particular type of magic, say, ancient rune magic. As they study it together, they start to understand each other better. Also, their families might slowly come to accept their friendship, which is a big deal considering the enmity between the Potters and the Malfoys.
One plotline could be that Draco accidentally drinks a love potion meant for someone else and falls for Harry. Harry is initially confused but then starts to see a different side of Draco. Another could be that a villain uses a love potion on both Harry and Draco to manipulate them into doing something against their will, and they have to fight against the false feelings while also dealing with their real, complicated relationship. A third plotline might be that Harry discovers a love potion that was used on Draco in the past, which explains some of his erratic behavior towards Harry, and they then explore their true feelings without the potion's influence.
One interesting plotline could be them teaming up to solve a mystery within Hogwarts that neither the Gryffindors nor the Slytherins are aware of on their own. For example, a hidden chamber that has secrets about the founders that could change the way the houses interact.
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.
Perhaps a plot where they all become animagi and have to use their animal forms to solve a mystery in the Forbidden Forest. Draco as a sleek snake, Harry as a stag, and Hermione as an otter, they must navigate the forest's dangers and uncover the truth about a strange magical disturbance.