A possible plot could be set in a post - war Hogwarts where everything is in chaos. Hermione is at the center of rebuilding the magical knowledge, and Remus is attracted to her intelligence and leadership. Tonks, who has always loved Remus, feels left behind. The story could then revolve around Tonks' attempts to understand Remus' new feelings, Hermione's obliviousness to the whole situation, and Remus' internal struggle between his old feelings for Tonks and his new - found attraction to Hermione. This would create a complex web of relationships and emotions within the fanfiction.
There might be some out there. You could start by looking on fanfiction platforms like Archive of Our Own. Just search for the relevant tags. However, this kind of pairing can be a bit of a crossover or AU (Alternate Universe) since in the original series, Remus has a relationship with Tonks, not Hermione. But fanfiction often plays with different pairings and scenarios.
A plot could be that Snape is suffering from some sort of post - war trauma that no one else seems to notice. Hermione, being the observant and empathetic person she is, decides to help him. She tries different methods like introducing him to Muggle therapies she has read about, or using calming spells and potions she creates herself. As she helps him, Snape begins to open up about his past, his feelings for Lily, and his experiences during the war, which in turn helps Hermione understand him better.
One common trope is the 'Forbidden Love' trope. Given Remus's age and his status as one of Harry's teachers, a relationship with Hermione would be considered inappropriate in the eyes of many in the wizarding world. This adds a layer of tension and drama to the story.
A common trope is the 'intellectual connection'. Hermione is very intelligent, and Remus is well - read and knowledgeable. Fanfictions often explore how they bond over books, spells, or complex magical theories. Also, the 'healing each other' trope is quite popular. Hermione can help Remus deal with his lycanthropy - related insecurities, while Remus can support Hermione through her academic or personal struggles.
It's also possible that their relationship could inspire a change in the wizarding world's views on werewolves. Since Hermione is a well - respected figure in the wizarding community, her relationship with Remus could start a movement towards more acceptance of werewolves. They could work together to advocate for werewolf rights, and their love story could become a symbol of hope and change in the magical world. This would be a really interesting and positive way for the fanfiction to develop.
One plot idea could be that Fleur starts off subtly trying to befriend Hermione. She might invite Hermione to various Beauxbatons events under the pretense of cultural exchange. Then, as time goes on, Fleur becomes more possessive, getting jealous when Hermione spends time with Harry or Ron. Another idea is that Fleur discovers Hermione's unique magical abilities and wants to keep her close to learn from her and also have her all to herself. Maybe she tries to isolate Hermione from the Hogwarts crowd.
There's also a story called 'Hermione's Choice' where she tells Remus she wants him in a very emotional and unexpected moment. The author does an amazing job of portraying the internal struggle within both characters. It shows how their relationship unfolds against the backdrop of the wizarding world's challenges.
Some Harry Potter - focused forums also might have what you're looking for. For example, the Leaky Cauldron forums. People there are fans of the series and might have written or know of some great 'Remus wants Hermione' fanfictions. You can create an account and ask in the relevant sections for any such fanfics.
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.
One possible plot could be Hermione seeking Lupin's help for some advanced magic study. Since Lupin is a knowledgeable wizard, he could guide her in a new area of magic, and during this process, a deep friendship or mentorship develops between them.