Maybe they get trapped in a magically sealed place. It could be an old, forgotten dungeon where the magic is so strong that they can't break free easily. Their friends would then have to find a way to rescue them.
There could be a situation where they are falsely accused of a crime within the wizarding world. This would lead to them being hunted by the Ministry of Magic while they try to prove their innocence and also deal with the real threat that's causing the trouble.
They might face a powerful dark wizard. In fanfiction, there are often new villains created. This new dark wizard could be after something they have, like an ancient magical artifact that Harry and Ginny are protecting.
Perhaps in the 'Harry and Ginny Potter Manor' fanfiction, the manor itself has some special powers or secrets. It could be that the rooms shift and change, revealing new areas filled with magical artifacts. Ginny might discover a hidden room dedicated to female witches of the Potter family and learn some powerful spells from it. Harry, on the other hand, could use the manor's resources to train young wizards in self - defense against the dark arts.
Another scenario could be that Ginny accepts but on the condition that they go on an adventure first. They could travel around the wizarding world, visiting different magical places they've only heard about, like the hidden valleys in Romania where dragons roam, before settling down to plan their future together.
In some fanfictions, it could be a really awkward encounter. Harry might feel a bit of tension since he has a history with Cho and is now with Ginny. Ginny, on the other hand, could be a bit jealous or just curious about their past. Maybe Cho would be polite but still have some unspoken feelings for Harry.
Well, they might have a really awkward encounter. Ginny could be shocked by the Dursleys' rudeness towards Harry. And Harry would probably be super tense, trying to keep Ginny from getting too involved in the Dursleys' mean - spirited remarks. Maybe Ginny would stand up for Harry more than he's used to, which could lead to an unexpected turn in the relationship between the Dursleys and Harry.
In fanfiction, when Harry and Ginny meet the Dursleys, there could be a lot of tension. The Dursleys are not fond of anything related to magic. Ginny, being a confident witch, might stand up to the Dursleys' rudeness towards Harry. Harry, on the other hand, would be in an awkward position as he has to deal with his Muggle family and his magical girlfriend at the same time. There could be some humorous exchanges as Ginny tries to understand the strange Muggle world of the Dursleys while also showing them that magic is not something to be feared.
In some fanfictions, it could be an awkward encounter. Harry might feel a bit of residual tension since he and Cho had a complicated relationship in the past. Ginny, on the other hand, might be a bit cautious, not sure how Cho will react. Maybe Cho will be polite but still have a hint of sadness seeing Harry with Ginny.
In fanfiction, when Harry and Ginny meet Sirius, Sirius might offer them some sage advice on dealing with the dark forces. He could share his experiences about fighting Voldemort and his Death Eaters. Maybe he would see the potential in Ginny and encourage her to further develop her magical abilities, as he has always been supportive of Harry.
Maybe Ginny gets injured during a Quidditch match, and Harry is beside himself with worry. He stays by her side day and night in the hospital wing. This makes Ginny realize how much he truly loves her, and it deepens their relationship. Their love story could be about these small yet significant moments that show how much they care for each other.
One possibility is that Ginny would be overjoyed. She has loved Harry for a long time. She might immediately say yes and then they would start planning their future together. They could think about where to live, perhaps near the Burrow or at Hogwarts if they both end up teaching there. Their friends would be very excited too, and there would be a big celebration at the Burrow with lots of Weasleys and their friends like Hermione and Ron all gathering to congratulate them.
In some fanfictions, they might travel to a secluded magical place. Maybe a hidden island where they can enjoy the peace and practice magic freely without any distractions.