In some fanfictions, a possible plotline is that Ginny gets injured, and Harry realizes how much he still loves her while taking care of her. This event makes them put aside their differences. Or perhaps there's a magical accident that forces them to work together to fix it, and during this process, they remember why they fell in love in the first place.
There could be a plotline where they meet by chance at the Burrow. At first, it's awkward, but then they start reminiscing about their old times together. The family atmosphere at the Burrow also plays a role in making them realize that they belong together. They gradually open up, forgive each other for past misunderstandings, and finally make up.
The main characters are Harry and Ginny. However, Luna Lovegood could also make an appearance. Luna has a unique perspective on things, and she might say something that makes Harry or Ginny see their relationship in a new light. Neville Longbottom could also be involved. Maybe he tells Harry about how Ginny has been doing since they split, which makes Harry think more about Ginny.
Maybe Harry accidentally says something hurtful about Ginny's Quidditch skills during an argument. Ginny is deeply offended and they part ways. Later, Harry witnesses Ginny's amazing Quidditch performance which makes him feel ashamed of his words. He then arranges a romantic dinner on the Quidditch pitch under the stars to apologize and they make up.
One possible plotline could be them facing new dark threats together while maintaining a strong relationship. They might travel the wizarding world, solving mysteries and strengthening their bond. Another could be their family life, with Ginny being a great support as Harry takes on new responsibilities in the Ministry. And they could also be involved in training the next generation of wizards at Hogwarts, all the while their love never wavering.
One possible plotline could be Ginny being influenced by a dark magical object that makes her turn against Harry. This could lead to a series of conflicts as Harry tries to figure out what's wrong with her and how to save her. Another plotline might involve Harry and Ginny being caught in a dark prophecy that forces them to make difficult choices that seem against their nature. For example, they might have to choose between saving each other or the wizarding world.
One interesting plotline could be the paparazzi misinterpreting a friendly moment between Harry and Ginny as something more romantic, which then causes chaos in their wizarding world. For example, they might take a picture of Harry helping Ginny up after she falls during Quidditch practice and spin it into a love affair story.
One interesting plotline could be how Harry and Ginny handle their kids' magical education. For example, they might have different ideas on whether to send them to Hogwarts early or let them study at home for a while first. Another could be the family's adventures during holidays, like exploring new magical places together.
One interesting plotline could be their post - war life. How they deal with the trauma of the war and build a normal life together. For example, they might struggle with nightmares but find comfort in each other.
One interesting plotline could be Harry and Ginny having a secret date in Hogsmeade. They might discover a hidden alley with a magical shop that holds a key to solving a mystery at Hogwarts. Another could be that they encounter a strange creature near Hogsmeade and have to work together to keep it from causing chaos in the village. And also, perhaps they meet an old wizard in Hogsmeade who tells them a prophecy about their future together.
Some fanfictions have a plotline where they form a secret club or group. They might be working against a new threat that the official Hogwarts authorities are not aware of. It shows their loyalty to each other and their ability to take matters into their own hands to protect the wizarding world.
Well, in some 'harry and ginny unexpected fanfiction', there could be a plot where Harry and Ginny accidentally swap their magical abilities. This would lead to a lot of comical and also challenging situations. For example, Ginny would have to deal with Harry's fame while Harry would have to adjust to Ginny's more personal relationships within the school. Also, there might be a story where they find a hidden chamber in Hogwarts that has a connection to their future together. Maybe it shows them visions of their possible lives and they have to decide how to make those visions a reality.