Well, one possible plot could be that the kids start showing signs of magic very early and Harry and Ginny have to figure out how to guide them properly. Maybe one of the kids has a really powerful and unique magical ability that attracts unwanted attention from dark forces.
Well, it could be about Harry and Ginny teaching their kids magic. Maybe they have a child who struggles with a particular spell, and they have to find creative ways to help.
One possible plot could be that one of their kids gets a mysterious fever that no magic can immediately cure. Ginny and Harry are worried sick and start to search for a solution. They might visit old friends like Hermione for help, who uses her vast knowledge to look into ancient spells or potions.
Obviously, Harry and Ginny are the main characters. Their kids would be important characters too. For example, James, Albus, and Lily. Then there could be their friends like Ron and Hermione, who might be the godparents or just good friends who are always around to give advice or help out.
Well, one possibility could be that the kids from the future come back to prevent a great disaster in the present. Maybe a dark wizard that was defeated in their time has somehow found a way to be reborn in the past (the present in the story), and they need to stop it before it's too late.
Obviously, Harry and Ginny are the main characters as they are the ones raising the kids. Their kids would also be important characters. Depending on how many kids they have in the fanfiction, each kid could have their own unique personality and story arc.
One possible reason could be a misunderstanding. Maybe Ginny misinterprets something Harry does and feels she can't stay in the relationship. Another reason might be that she feels overshadowed by Harry's fame and the pressure of being part of the Potter family. It could also be that she has some personal goals or dreams that she realizes she can't pursue while being with Harry and taking care of the kids.
One possible reason could be that she is forced to for some dark magic related plot. Maybe an evil wizard has put a spell on her that makes her think she has to leave to protect them. Another reason might be that she feels suffocated in her life with Harry and the kids, longing for her old adventurous self and thus decides to abandon them to seek freedom.
In this fanfiction's afterlife, Harry and Ginny might be in a place where time has no meaning. They could be constantly surrounded by a warm, golden light that represents all the love and positive energy they've created during their lives. They start to discover hidden powers within themselves that allow them to shape the afterlife realm. For example, they might create beautiful gardens filled with magical plants that only exist in their memories from Hogwarts. Their relationship becomes even deeper as they work together to make this afterlife place a haven for other souls.
Maybe in this fanfiction, they are at the lake to practice some magic. Ginny could be showing Harry a special spell she learned, and they end up having a little magical adventure right there by the lake. For example, they might accidentally summon some friendly magical creatures from the water.
Well, it could be about a friendly duel for practice. Maybe they are trying out new spells they've learned at Hogwarts. Harry might use his signature spells like Expelliarmus, while Ginny shows off some of the more advanced spells she's picked up from the D.A.