One idea could be that Harry and Hermione find a time - turning device. They use it to go back and change key events in the wizarding war. For example, they might prevent Cedric's death, which could have a huge impact on the future of Hogwarts and the wizarding world.
They could find a way to change the future by altering the way magic is taught at Hogwarts. Instead of the traditional house system that sometimes causes division, they create a more unified curriculum. This could lead to less inter - house rivalry and a stronger, more united wizarding community in the future.
Perhaps they discover a prophecy that wasn't fully understood before. By changing the future based on this new knowledge, they could end up uniting the wizarding and Muggle worlds in a way that was never thought possible. They might start by revealing magic to a few key Muggles and gradually expand it, changing the future of both societies.
Perhaps a story where the magical world is trying to integrate more with the non - magical world in the future. Harry Potter's kids could be at the forefront of this movement, dealing with both the excitement and the challenges that come with it. There could be political intrigue as some wizards oppose this integration.
One plot idea could be that Hermione and Ginny team up to play a prank on Harry, but it backfires in a hilarious way. For example, they try to make his hair turn purple but instead it starts changing colors every few seconds. Another idea is that the three of them go on a secret adventure outside of Hogwarts to find a lost magical artifact. They face various challenges and their friendship is tested. And perhaps a plot where Hermione discovers a new spell that accidentally causes some chaos between Ginny and Harry's relationship, and she has to find a way to fix it.
One idea could be that they go on a magical picnic in a hidden meadow in Hogwarts grounds. They use magic to create floating plates and self - serving dishes of their favorite foods. Another could be that they attend a wizarding concert together and discover a newfound love for a particular type of magical music.
A plot could involve Slytherin Hermione and Harry being paired for a long - term project by a teacher who wants to encourage inter - house cooperation. At first, they struggle because of their different house values, but gradually they find common ground. For example, Hermione's Slytherin cunning helps them outwit some bullies who are trying to steal their project ideas, and Harry's Gryffindor courage gives Hermione the push she needs to stand up to some of the more elitist Slytherins who look down on her for her non - pure - blood status. Or perhaps they discover a hidden prophecy that only they can understand together, and it has something to do with a new threat to Hogwarts that combines elements of both Slytherin's ambition and Gryffindor's heroism.
A great plot for Harry and Hermione's wedding fanfiction could be that they face some sort of dark magic threat right before the wedding. They have to use their combined skills and the help of their friends to overcome it. Then, the wedding becomes not just a celebration of their love but also a victory over evil. For the actual wedding, Hermione could wear a dress that has some magical properties, like changing colors to match her mood, and Harry could have a special wand that he uses to create a unique display of magic during the ceremony.
One plot idea could be that Hermione and Harry discover an old, mysterious orphanage during one of their adventures. Inside, they find magical artifacts that are linked to their pasts. Another could be they start an orphanage of their own for wizarding children who have lost their families in the war. It could be a place of learning and safety.
Well, perhaps in the fanfiction, there is a prophecy that their unborn child will be the key to a great change in the wizarding world. This makes them a target for both good and bad forces. They struggle with the decision of whether to keep the baby's existence a secret or to embrace it publicly. And as Hermione's pregnancy progresses, they face many challenges, both physical and emotional, as they prepare for parenthood in a world full of magic and danger.
One plot idea could be that Hermione becomes overly possessive when Harry starts getting a lot of attention from other witches at Hogwarts. She might start using her intelligence to outwit those girls in a rather devious but humorous way, like tricking them into embarrassing situations so they'll stay away from Harry.
Well, perhaps they have a child who is really interested in Muggle studies, much to the amusement of Harry who has some Muggle - like tendencies. And they struggle a bit with how to balance their child's interest in Muggle things with the wizarding world they live in. Also, there could be a plot where the family has to deal with some old enemies of Harry's who are seeking revenge, but this time they have to protect not just themselves but also their child. It could show how they use their combined skills and knowledge to keep their family safe.
One idea could be that their child discovers a hidden magical ability that neither Harry nor Hermione possess. For example, the ability to communicate with magical creatures in a unique way. Another could be that the child gets into trouble at Hogwarts by accidentally stumbling upon a long - forgotten and dangerous spell.