One possibility is that Harry leaves Hogwarts to go on a solo adventure to find more about his family's past. He might travel to different wizarding communities that his parents were associated with, uncovering secrets along the way.
Maybe Harry leaves Hogwarts because he feels a greater calling outside the school walls. He could be on a mission to train young, outcast wizards in a more practical and real - world way, far from the structured learning of Hogwarts. He might start a small, hidden school of his own in a remote location, teaching skills that Hogwarts doesn't cover fully, like how to survive in the Muggle world as a wizard without using magic all the time.
One possible plot could be that Harry leaves Hogwarts to hunt down the remaining Death Eaters on his own. He might feel that he can't put his friends in danger anymore and takes it upon himself to rid the wizarding world of the last remnants of Voldemort's followers.
One possible reason could be that she's frustrated with the school's bureaucracy. For example, if she constantly faces obstacles in getting approval for new study groups or advanced classes. Another reason might be a personal quest. Maybe she discovers a hidden mystery outside of Hogwarts that she can't explore while being a student there.
Maybe Percy leaves the hunt because he has some personal issues to deal with. For example, he might have a family matter that requires his full attention. Or perhaps he has a different mission or goal in mind that conflicts with the hunt.
It could be that there's a powerful enemy that has taken over Hogwarts and Harry, in a desperate attempt to stop this evil from spreading, resorts to destroying the school. He might think that rebuilding it later is better than allowing it to be used for evil purposes. For example, if Voldemort had found a way to permanently taint the magic of Hogwarts, Harry might see destruction as the only option.
Well, it could start with Harry nervously asking Ginny to meet him at the Hogwarts grounds. Maybe they go for a walk by the lake, holding hands and sharing stories. They could end up at the Astronomy Tower, looking at the stars and having a really deep conversation about their future together.
Well, perhaps the fanfic could focus on their travels. They decide to explore different parts of the wizarding world that they haven't seen before. Along the way, they encounter old friends and new magical creatures. And they also have to deal with some dark wizards who are still causing trouble after the war.
In the 'harry potter after hogwarts fanfic', a really interesting plot could be about the discovery of new magical creatures or lost spells. Harry, being the adventurous type, might go on quests to explore these new elements. He could also get involved in international wizarding relations, using his fame and experience to bridge gaps between different wizarding communities around the world. This would open up a whole new world of magic for the readers to explore.
He could confide in his friends like Ron and Hermione. They would surely support him and come up with a plan to stop the bullying.
Maybe the fanfiction portrays some really dark and disturbing events that make Harry feel he can't stay at Hogwarts anymore. For example, if it involves his friends being seriously harmed in the fictional story in a way that he can't bear to be associated with the place where it all seems to be happening.
It could also be due to personal reasons related to his growth and self - discovery. The events of the Triwizard Tournament might make him realize that he needs to find his own path outside of Hogwarts for a while. He might feel that the school can't offer him the answers or the experiences he needs at that moment to become stronger and more independent.