Imagine they are shopping in Diagon Alley. Harry is distracted by some new magical artifacts and doesn't notice Ginny trying to show him something she really likes. Ginny rolls her eyes at his obliviousness and then playfully drags him over to what she wants to show him. It could be a piece of jewelry or a new type of broomstick accessory. This small moment can be part of a larger fanfiction about their day out in Diagon Alley, with other interactions and adventures.
One possible fanfiction could be about Harry and Ginny having an argument. Ginny rolls her eyes when Harry makes a particularly over - protective statement. For example, Harry might say something like 'Ginny, you can't go on that mission alone, it's too dangerous' and Ginny, being the strong - willed witch she is, rolls her eyes and says 'Harry, I've faced worse and you know it'.
One possible scenario could be that Ginny meets an old acquaintance who has changed a great deal and she starts to have feelings for this person while still being with Harry. Maybe they share a common interest that she feels Harry doesn't understand. However, this goes against Ginny's strong character in the original series, so it's a very different take in fanfiction.
One interesting scenario could be them exploring hidden parts of Hogwarts together. They might find a secret room filled with old magic artifacts that have been long forgotten. This could lead to an adventure where they have to figure out how to use or protect these items from falling into the wrong hands.
In some versions, it could be that Harry has to die to break a dark curse placed on Ginny. He discovers that his life is the key to saving her and willingly gives it up. He might have a premonition about Ginny's fate and decides that his death is the only way to change it. He then confronts the source of the curse and allows it to take his life instead of Ginny's.
One interesting scenario could be that they have a dinner by the lake at Hogwarts. Ginny might have prepared all of Harry's favorite foods, like treacle tart. They could be reminiscing about their adventures at Hogwarts while enjoying the meal.
In some fanfictions, they might go on adventures together. Exploring the wizarding world more fully, perhaps seeking out new magical creatures or ancient magic. They have a thirst for discovery after the chaos of the war. Harry's knowledge and Ginny's courage would make them a great team on these excursions.
One scenario could be that Ginny has prepared a special surprise for Harry in the common room. She has decorated it with floating candles and their favorite flowers. When Harry enters, she plays a soft, romantic song on her wand - charmed radio. They then slow - dance under the candlelight, lost in their own world.
One scenario could be that they are alone in the Gryffindor common room. The warm firelight is flickering, and the room is quiet. Ginny might be nervously fiddling with her hair, and Harry, feeling a sudden rush of courage, leans in and they share their first kiss.
In some fanfictions, Harry and Ginny might fight side by side, using their respective magical skills. Ginny could be shown as a fierce fighter, using her Bat - Bogey Hex to great effect against the enemies, while Harry uses his Patronus to protect them from Dementors if any are present during the battle.
One scenario could be after a particularly difficult encounter with a Death Eater. Harry is shaken and full of self - doubt. Ginny takes him to the edge of the Black Lake. They sit there, and Ginny just holds his hand, letting him know she's there. The peacefulness of the lake and Ginny's silent support start to soothe Harry.