In a 'Harry Potter left magic behind' fanfiction, the plot could involve Harry feeling guilty about all the destruction magic has caused. So he abandons it and starts anew in a remote place. He tries to build relationships with Muggles based on honesty. But as time passes, he realizes that magic is a part of him and he has to find a balance. Maybe he starts teaching some Muggles about the good side of magic in a very discreet way to help them better understand the world around them.
Well, the fanfiction could be about Harry Potter leaving magic behind after the final battle. He could be disillusioned with the wizarding society's politics and power struggles. He leaves and tries to find peace. He might end up in a small village where he uses his non - magical skills, like his courage and quick thinking, to help the local people. But then, a new magical threat emerges that only he can truly understand, and he has to decide whether to embrace his magic again to save the day.
It could be a new dark wizard who rises to power in the wizarding world. This wizard blames Harry for leaving and believes that his departure has made the wizarding world weaker. So the new dark wizard sends his minions to the Muggle world to force Harry to return to the wizarding world and face him, or else he will start causing chaos among Muggles which Harry has come to care about.
It's possible that he hates it because in fanfiction, his friends and he himself might be portrayed in ways that are completely different from who they really are. For example, Hermione might be made into a silly character instead of the intelligent and brave witch she is. This distortion of the people he cares about could be a big factor.
Well, perhaps Harry could be trained in some long - lost or dark magic that Dumbledore has been hiding from him. This new training might make him even more powerful than before, able to defeat Voldemort in a more spectacular way.
Well, it could be about Harry Potter becoming the ultimate ruler of the magic world. Maybe he discovers some ancient magic that gives him the power to control all aspects of magic, from Hogwarts to the Ministry of Magic. He might use this power to bring about a new era of peace and harmony among wizards and witches, while also dealing with the dark forces that still lurk in the shadows.
One possibility could be that Harry is cursed by a dark wizard. This curse slowly drains his magic, causing him to struggle with everyday wizarding tasks. He might have to rely more on his non - magical skills and the help of his friends. For example, Hermione could use her vast knowledge to find a way to reverse the curse while Ron provides emotional support.
It could be about a hidden part of Hogwarts that serves as a magic sanctuary. Maybe some students discover it by accident and find ancient spells or magical creatures there.
One possible plot could be that Harry discovers his unique connection to Lady Magic early on. This newfound knowledge gives him even greater power and a different perspective on his battles against Voldemort. He might be able to access magic in ways that others can't, and use it to protect his friends more effectively.
The plot could involve the trio being transferred to Hogwarts as part of an exchange program between their world and the wizarding world. At Hogwarts, they face challenges like dealing with the strict rules of the school, which are very different from what they are used to in Hetalia. They also have to learn how to play Quidditch, which is a completely new sport for them.
Perhaps Voldemort somehow manages to bring the Left 4 Dead zombies into the wizarding world. The Order of the Phoenix and the Death Eaters are forced to team up to survive. The Death Eaters' dark magic might be used in new and unexpected ways against the zombies, and the Order's more defensive and protective spells would also be crucial. Harry, being the hero, could figure out a way to stop Voldemort from bringing in more zombies and find a way to send the existing ones back.
Maybe Naruto is left behind in training because the instructor misjudges his abilities. As a result, Naruto starts training with a retired ninja who teaches him some old - fashioned but effective techniques. This gives him an edge when he finally rejoins his group.