One interesting plotline could be Ginny helping Harry deal with his post - war trauma. Since Harry has been through so much in the war, Ginny could be the one to bring him back to a more normal life, with their relationship growing deeper as she offers him emotional support.
One interesting plotline could be Ginny being the one to finally break through Harry's post - war trauma. She uses her understanding of him and her own strength to help him heal. For example, she takes him on a journey through the places in Hogwarts that hold their memories, both good and bad, to make him face his emotions.
A great plotline might involve Ginny using her Quidditch skills to start a new team or training program at Hogwarts, and Harry supporting her in this endeavor. They could also face some sort of mystery related to an old Hogwarts secret that only they, with their combined knowledge of the school's history, can solve.
One possible plotline could be the twins competing for Harry's affection in a friendly yet intense way. They might use their unique pranks and charms to win him over.
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.