One common theme is the power imbalance. Snape is a powerful and often intimidating figure, and Hermione is a brilliant but still young witch. The fanfictions often play on this dynamic, exploring how power can be both alluring and dangerous in a relationship.
There's also 'Shadows of Attraction'. In this fanfic, Snape's dark side starts to have an intense longing for Hermione. It shows how Hermione navigates this strange and somewhat dangerous situation while still being true to her own character. It's a really interesting read if you like exploring the darker, more complex relationships in the Harry Potter universe.
One possible theme could be redemption. Snape, who has a complex past, might see Hermione as a way to redeem himself. Maybe he realizes her intelligence and potential and wants to guide her in a different way than he does with other students.
Yes, there are. You can find them on various fanfiction websites. One interesting aspect in these stories could be how they overcome the age gap and the initial animosity Snape had towards Hermione in the original series. It often involves character development for both of them.
Hermione could start by showing her genuine intentions. For example, she could offer to help Snape with his potions research without asking for anything in return. Since Snape is passionate about potions, this might pique his interest and make him less resistant.
In a fanfiction, Snape might want to help Hermione when she is wrongly accused of stealing powerful magical artifacts. Snape, knowing her character, decides to use his skills as a Potions master and his knowledge of the castle's secrets to find the real culprit and clear Hermione's name. He could be motivated by his new - found respect for her intelligence and her Muggle - born status which he has come to understand better over time.
Another option is Wattpad. There are many users on Wattpad who write fanfictions. Just use the search bar and type in the relevant keywords. However, the quality might vary, so you may need to do some sorting through the results.
One common theme is redemption. Snape, with his complex past, might find redemption through his relationship with Hermione. Another is the breaking of stereotypes. Hermione is a Muggle - born and Snape has his own prejudices which are overcome.
In the context of fanfiction, it could be a very interesting character study. Hermione is known for her strong will, so seeing her in a situation where she has to do whatever Snape wants could show a different side of her. It might also give more depth to Snape's character, as we see how he interacts with Hermione in this unorthodox situation.
Their relationship could start off very tentatively. Snape would be his usual gruff self, but Hermione would notice his small acts of help. As time goes on, she might start to trust him more and they could develop a sort of mentor - mentee relationship, with Snape passing on some of his more esoteric knowledge of magic to Hermione.