It could also be that in a world where the Marauders are still alive, Hermione somehow gets transported back in time. She starts flirting with Remus to blend in and survive in this new environment, but gradually falls in love with him. Their relationship then becomes a complex web of time - travel implications and romantic feelings.
One possible plotline could be that Hermione starts flirting with Remus as a way to learn more about the wizarding world's history from his perspective. Since he's older and has experienced a lot, her flirting is a means to an end at first, but then it develops into something more.
In some fanfiction, it can be a common trope. Writers might be attracted to the idea of the older, more experienced Remus Lupin showing an unexpected interest in the intelligent and capable Hermione. It adds an element of surprise and can create interesting relationship dynamics that deviate from the original series.
One popular fanfiction site is Archive of Our Own (AO3). You can search for 'hermione flirts with remus lupin' there and you'll find a variety of stories. Some might explore the unique dynamic between Hermione's intelligence and Remus' more reserved nature, creating interesting scenarios where her flirting could lead to different adventures and relationships within the wizarding world.
Another plotline could be a time - travel scenario. Hermione accidentally travels back in time and meets a younger Remus Lupin. They form an unlikely bond as she tries to help him with his werewolf problem without changing too much of the future. This often involves a lot of emotional and intellectual exchanges between them as they both are very intelligent characters.
One plotline could be that Sirius is trying to make Remus Lupin jealous by flirting with Hermione. He might not have real feelings at first but then actually starts to develop them as he gets to know her better.
In some fanfictions, Remus Lupin might be hard for Hermione because of their age difference. Lupin is much older, and this can create complex power dynamics and social taboos in the relationship. Also, their personalities are quite different. Hermione is highly studious and often by - the - book, while Lupin has a more laid - back and world - weary nature, which could lead to clashes and difficulties in their interactions.
There could be a story where a dark wizard is trying to use werewolves for his evil plans. Harry, Hermione, and Remus get wind of it. They then work to stop the dark wizard. Along the way, they face internal struggles as werewolves, like Remus dealing with his self - loathing and Harry and Hermione coming to terms with their new werewolf identities.
The time period they belong to can also be a factor. Remus was part of an older generation that had been through the First Wizarding War. Hermione was born later and grew up in a different era. Their different outlooks based on the time they lived in can make it hard to connect in fanfiction. For instance, Remus might be more cynical about the wizarding world due to his past experiences, while Hermione is more idealistic and believes in the power of knowledge and change.
Well, one possibility could be that in this fanfiction, Lupin sees Hermione's intelligence and loyalty in a way that he feels a deeper connection with her compared to Tonks. Maybe Hermione helps him in some sort of magical research or during a difficult time at Hogwarts, and through those experiences, his feelings for her grow stronger than his feelings for Tonks.
A possible motive could be revenge. Some characters who have a grudge against Lupin, perhaps because of his association with certain groups or events in the wizarding world, might kidnap him. For example, if a werewolf-hating group found out his identity, they could kidnap him to make an example out of him.
One possibility in such a fanfiction could be that the age difference between Remus and Hermione creates a complex dynamic. However, their shared love for knowledge and their kind hearts could be the initial attractions. For example, they might bond over a particularly difficult spell or a piece of magical history that others overlook.