The fanfiction might start with Harry being really nervous about asking Ginny. He confides in Hermione and Ron first. Hermione gives him advice on how to make it really special. So Harry decides to take Ginny on a trip to the place where they first met outside of Hogwarts. He arranges for a magical display of lights in the shape of their memories together. Then he asks her to marry him, saying that she is the only one who truly understands his heart.
One possible plot could be that Harry plans a very elaborate and private proposal. He takes Ginny to their favorite place in Hogwarts, perhaps the Room of Requirement set up as a beautiful garden filled with the flowers Ginny loves. He gets down on one knee and tells her how she has been his rock through all the post - war chaos and how he can't imagine a future without her.
Well, one possible plot could be that after years of fighting side by side and having a deep understanding of each other, Sasuke finally realizes his true feelings for Naruto are more than just friendship. He might plan a very private and special moment to pop the question. Naruto, being the open - hearted person he is, would be initially shocked but then consider it seriously as he also values Sasuke deeply.
Well, one possibility is that Natsu finally realizes his deep love for Lucy after a big adventure. They've been through so much together, facing powerful enemies and saving each other countless times. So, in a quiet moment, maybe on a hilltop overlooking their guild, Natsu gets down on one knee and asks Lucy to marry him. She's overjoyed and says yes, and then the whole guild celebrates their engagement.
One possibility is that after many adventures and overcoming numerous obstacles together, Nick realizes he can't live without Adalind. He plans a grand and romantic gesture, perhaps in a place that holds special meaning for them. He tells her how she has changed his life and how he wants to build a future with her, and then pops the question.
He could create a memory book filled with all their shared memories, from their first meeting to their most recent adventures. At the end of the book, there could be a page that says 'Ginny, will you marry me?'. Then he presents it to her during a quiet evening by the fireplace at the Burrow.
It could be that Harry has received some bad news about the wizarding world facing a new threat, though not as big as Voldemort yet. He's worried and breaks down in tears. Ginny comes to his side. She first just hugs him and lets him cry it out. Then she starts coming up with plans on how they can face this new threat together, with their friends. She gives him confidence that they can handle anything as long as they are together.
Ginny asking Harry out could lead to a very interesting chain of events. It could cause some jealousy among other students who have a crush on either of them. Ron, for example, might be a bit taken aback at first but then come around to support his sister and best friend. As for their date, it could be something unique like a midnight stroll in the Forbidden Forest (with proper precautions of course), where they talk about their fears, hopes and dreams, deepening their connection.
In the 'Harry asks Ginny to the Yule Ball' fanfiction, it could be that Ginny is initially shocked when Harry asks her. She might have thought he would ask someone else. But after a moment of hesitation, she accepts. And later they have a great time at the ball, dancing and chatting with their friends, and this could be the start of a deeper relationship between them.
Well, one possibility is that Yukino is completely taken aback. She might not be expecting it at all. She could initially say no because she's not sure about her feelings or she might be worried about how it will change their lives. But then, as she thinks more about it, she realizes that she does love Natsu and they start planning a future together.
In such a fanfic, perhaps Ginny uses some kind of magical coercion. Maybe she has found a powerful spell that bends Harry's will just enough to make him agree to the marriage. It could also be that she manipulates a situation where Harry feels he has no other choice but to marry her, like threatening to expose a secret of his that could harm his reputation.
One possible plot twist could be that Ginny says no at first. Maybe she has her own reasons like she already promised someone else she'd go with them as friends. But then later she realizes she really wants to go with Harry and finds a way to change her plans.