Another idea is that there is a mysterious water body on the outskirts of their magical world. Hermione and Ginny, being adventurous, decide to explore it. They find that it has some sort of ancient watersport that has been forgotten. They then strive to revive this sport and in the process, learn more about their magical heritage and also strengthen their friendship.
Perhaps they are part of a school project related to water magic and watersports. They start exploring different aspects of it, like how to use water spells to enhance their performance in the sport. As they progress, they might have to overcome their own insecurities and rivalries within the school.
Hermione's intelligence and Ginny's courage make them an interesting pair. Hermione can use her vast knowledge to strategize in watersports, while Ginny's boldness allows her to take risks and try new moves. For example, in a water polo - like magical sport, Hermione could plan the plays and Ginny would execute them fearlessly.
One plot idea could be that Hermione and Ginny team up to play a prank on Harry, but it backfires in a hilarious way. For example, they try to make his hair turn purple but instead it starts changing colors every few seconds. Another idea is that the three of them go on a secret adventure outside of Hogwarts to find a lost magical artifact. They face various challenges and their friendship is tested. And perhaps a plot where Hermione discovers a new spell that accidentally causes some chaos between Ginny and Harry's relationship, and she has to find a way to fix it.
Well, they might be shopping for Quidditch gear. Ginny, being a Quidditch enthusiast, could be dragging Hermione along to find the latest broom accessories or team uniforms. Along the way, they get into a bit of trouble when they accidentally stumble upon a shop that sells dark or restricted items. They have to figure out how to get out of there without getting in trouble with the Ministry. And perhaps they end up finding a really cool, legal Quidditch item that helps Ginny's team win their next match.
Well, perhaps in a story where there's a misunderstanding. Ginny misinterprets Hermione's advice about her relationship with Harry as Hermione trying to break them up. So, Ginny lashes out at Hermione, saying mean things. For example, she might tell Hermione that she's always been a know - it - all and no one really likes her for it. This would really hurt Hermione, who was only trying to help. And then the story could be about how they resolve this misunderstanding.
One plot idea could be that they start off as friends but gradually realize their deeper feelings during a time of crisis at Hogwarts, like when the school is under attack. Their shared experiences and the need to protect each other could lead to a kiss.
Perhaps a fanfiction where Hermione and Ginny are pregnant, and they discover that their unborn children have a special connection. It could be a magical bond that is predicted to change the future of the wizarding world. They then embark on a journey to understand this connection better, meeting different magical creatures and ancient wizards along the way who might have some knowledge about it.
One plot idea could be that the Winchester brothers have to face a water - dwelling supernatural creature while on a boating trip. Maybe it's a mermaid - like being that lures sailors to their doom, and they have to figure out how to stop it without getting trapped in its watery lair.
One plot idea could be a time - travel fanfiction where they get married in an alternate timeline. Maybe Harry accidentally activates a time - turning device and ends up in a world where he, Ginny and Hermione all decide to have a triple wedding for some magical reason. Another could be a post - war fanfiction where they get married as a symbol of new beginnings and unity among the wizarding community. For example, their weddings could be grand events that bring together all the different houses and factions that were once divided during the war.
One great idea is a fanfiction about Hermione's travels around the wizarding world to discover new spells and magical creatures. She could go on a solo adventure, documenting her findings and using her intelligence to overcome various challenges along the way.
A plot could revolve around a school project where they team up. They decide to study a rare magical phenomenon that has been causing strange things to happen at Hogwarts. As they dig deeper, they realize it's related to a forgotten spell from the past. They face opposition from some students who think they're meddling in dangerous magic, but they persevere and eventually solve the mystery.