One possibility could be that he discovers a different magical school. Maybe there's a hidden school in the Muggle world that he stumbles upon. It could have its own unique curriculum and culture. He might make new friends there and learn magic in a completely different way compared to how it's taught at Hogwarts.
Perhaps he gets taken in by a powerful wizard outside of Hogwarts' influence. This wizard could be a bit of a recluse and teach Harry magic in seclusion. Harry would then have a very different magical upbringing. He might not be as influenced by the Hogwarts house system and the rivalries that come with it, and could grow into a more independent and self - reliant wizard.
In this fanfiction, it could be that Harry has a falling - out with Dumbledore or other important figures at Hogwarts. This makes him feel unwelcome or betrayed, leading him to choose not to go to Hogwarts and seek another path in the magical world.
Perhaps the wizarding world is in a state of chaos and Hogwarts is no longer considered a safe place. So, Harry's parents keep him at home. They might form a small group of like - minded wizards and witches who also want to keep their children away from Hogwarts. Together, they create their own mini - school or study group where they exchange knowledge and magic techniques. Harry could grow up with a closer - knit community and develop strong bonds with these families.
One possible reason could be that in the fanfiction, his family might have decided to keep him away from the wizarding world for his safety. Maybe they feared the dark forces at Hogwarts, like Voldemort's followers.
Luna Lovegood's father, Xenophilius Lovegood. He's an eccentric but knowledgeable wizard. He could introduce Harry to some very unique forms of magic and different ways of thinking about the magical world. Harry would get to explore some really out - there magical concepts under his mentorship.
The plot might develop with Harry exploring the non - Hogwarts magical world. He could meet new characters who introduce him to different magical cultures and spells.
She could end up in a non - magical educational institution for a while. During this time, she might try to apply her love for learning in a different context, like studying advanced sciences. However, her magical abilities would still be there, and she could end up using them in unique ways, perhaps accidentally, which could draw the attention of the wizarding world and lead to her being brought into the magical community in a very different way than going to Hogwarts.
Maybe in the fanfiction, Harry has some bad experiences at Hogwarts before. For example, he might have been bullied by some students or had a really tough time with certain teachers. So he doesn't want to go back.
It could be that in this fanfiction, Harry has found a new place outside of Hogwarts that he feels more comfortable in. He might have made new friends or discovered new magic that he can't practice at Hogwarts, so he doesn't want to go there.
Maybe it's about three people having amazing adventures at Hogwarts. They could be learning magic, making new friends, and getting into all sorts of trouble like sneaking into the Forbidden Forest or trying to find hidden passages in the castle.
One possible plot could be that Hogwarts is facing a new and powerful dark magic threat. Maybe a long - lost dark wizard's spell has been activated and is slowly draining the magic from the school. The students and teachers then have to work together to find a way to reverse the spell. They might search through old tomes in the restricted section of the library and go on adventures outside the school to gather rare ingredients for a counter - spell.