One possible reason in such a fanfiction could be a magical bond that forms between Harry and Draco unexpectedly. This bond might be stronger than his relationship with Ginny. It could be a result of a shared magical experience or a prophecy that ties them together in a way that makes Harry question his feelings for Ginny and ultimately choose Draco.
Well, it could cause quite a stir in the wizarding world. First, the relationship between Harry and Draco has always been complex and full of rivalry. If Harry leaves Draco for Ginny, the Malfoy family might feel a sense of victory in a strange way, as Draco has been in this sort of unspoken competition with Harry. For Ginny, it would be a big step forward in her relationship with Harry. And among their friends, like Hermione and Ron, they might have mixed feelings. Hermione might be worried about how this would change the dynamics among them all, while Ron would probably be more focused on how it affects Harry's happiness.
In some fanfictions, Draco might propose to Ginny after a long journey of character development for both of them. Maybe they've been through some difficult situations together, like fighting a common enemy. This could make them see each other in a new light. As they start to understand and respect one another more deeply, Draco could find the courage to propose to Ginny.
The first consequence could be the breakdown of his friendship with Ron. Since Ron is Ginny's brother, he would likely be very angry at Harry for hurting his sister. Another consequence might be the division within the wizarding community. Fans of Harry and Ginny as a couple would be disappointed, and there could be a lot of speculation and gossip.
For Harry, he might experience a sense of relief and new - found happiness with Ginny. He's been through so much, and Ginny represents a more stable and loving relationship compared to the complex dynamic with Draco. Ginny, on the other hand, would be overjoyed to finally have Harry fully committed to her. For Draco, it would be a huge blow. He might feel rejected and angry, especially since his relationship with Harry was always so competitive.
Ginny might first be in shock and denial. But then she could draw on her Gryffindor courage. She would probably turn to her family for support. The Weasleys are a close - knit family, and they would surely rally around her, providing emotional and practical help.
It could be that Draco is following orders from some dark forces. They see Ginny as a way to get to Harry, and Draco, being their follower, tries to target Ginny. He might think that by getting Ginny, he can gain more power or favor within those dark circles.
One possible reason could be that Draco is scared of the responsibility. He might come from a family with certain expectations and the idea of having a child with Ginny, who is from a different side in the wizarding world, could be too much for him to handle.
There could be a situation where Draco has a change of heart later. Maybe he realizes his mistake after some time away and tries to come back into Hermione's life. This could lead to a very emotional and complex reunion, with Hermione having to decide whether to forgive him or not.
In this type of fanfiction, it could be that Harry has some unresolved issues from his past relationship with Cho. He sees Ginny as a distraction from dealing with those. But as time goes on, he can't ignore the pull he still feels towards Cho. He may leave Ginny when he realizes that he can't move forward in his life without exploring what could have been with Cho again.
Well, Harry leaving for America in fanfiction could lead to him trying to adapt to a new culture. He might struggle with the differences in magic use between the two countries. For example, the way spells are pronounced or the types of potions that are popular. He could also get involved in some sort of mystery that is unique to the American wizarding community.