Another option is Wattpad. It has a large community of fanfiction writers. Although it's not as well - known for Harry Potter fanfiction as AO3 or Fanfiction.net, it still might have some unique stories about Remus Lupin and Hermione. You can use relevant tags and keywords to narrow down your search.
The 'alternate universe' trope is also common. In some fanfictions, the story might be set in a world where the normal rules of the Harry Potter universe don't apply. For example, there could be a world where age differences don't matter as much, or where Remus and Hermione are brought together in a different context, like they are on a secret mission together and their relationship blossoms during that time. There are also stories that might involve time - travel, where Hermione goes back in time and meets a younger Remus, which adds another layer of complexity to their relationship.
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.
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.
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.
Also, it gives fans a chance to see different aspects of the 'Harry Potter' universe. Hermione is often associated with Harry and Ron, but in fanfiction with Remus, she gets to be in a different kind of relationship. It allows for new storylines and character developments that might not have been explored in the original books.
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.
One common theme is the exploration of an unlikely friendship or relationship. Given their different ages and backgrounds in the original series, seeing them interact in a new way in fanfiction is interesting. Another theme could be about growth. Hermione might grow in terms of her understanding of the more complex aspects of the wizarding world through Remus, and Remus could grow in terms of his ability to open up and trust again. Also, themes of protection and loyalty often come up, with Remus protecting Hermione from various threats and Hermione remaining loyal to Remus in difficult situations.
Perhaps Remus first notices Hermione's kindness towards him regarding his werewolf condition. She doesn't shy away but instead tries to find ways to help him. This kindness grows into something more, and they start to share their feelings. Their relationship could develop as they face challenges together, like dealing with the prejudice against werewolves. Hermione's strong will and Remus' experience combine to make them a formidable pair in the fanfiction.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). There are a large number of Harry Potter fanfictions there, and you're likely to find some that involve Hermione and Professor Lupin. Another option is Fanfiction.net. Just use their search function and type in relevant keywords like 'Hermione Lupin' to narrow down the results.