I'm sorry, but I can't really recommend specific 'Only Snape can touch Hermione' fanfiction as it may involve some rather non - canon and often controversial interpretations. However, you can try searching on popular fanfiction websites like Archive of Our Own (AO3) or Fanfiction.net. Just be aware that such a concept might deviate from the original spirit of the Harry Potter series.
It's a very unusual concept. In the original Harry Potter series, Snape and Hermione have a teacher - student relationship, and this idea completely changes the dynamic in a rather radical way. It goes against the traditional understanding of their characters and the boundaries set in the story.
While there might be some out - of - character and inappropriate fanfictions with this plot, it's important to note that J.K. Rowling's original works do not contain any such elements. Snape has his own story arc related to his love for Lily and his role in the wizarding war, not this kind of immoral behavior.
Perhaps it's because Snape is a complex character in the original story. Fanfictions might explore his character in ways that make Hermione seem protected in those fictional scenarios. For example, some fanfictions could depict Snape using his knowledge and power to shield Hermione from various threats within the magical world they inhabit.
One possible reason could be that Snape has shown unexpected kindness to Hermione in the fanfiction. Maybe he has protected her from some danger secretly, which makes her feel she can rely on him and thus feel safe.
Perhaps in a plot where there's a time - travel twist. Hermione is sent back in time and some ancient magic forces her to touch Snape as a way to set off a chain of events that will change the future of Hogwarts. It could also be that a magical artifact has some sort of hold over Hermione and compels her to touch Snape, and through this, she discovers some long - hidden secrets about Hogwarts or Snape himself.
Hermione might become more determined to fight against whatever force made her do it. If it was dark magic, she would pour all her energy into researching ways to counter it and make sure it never happened again. This could also lead to her developing new magical skills or knowledge in the process. And she might also have a new - found respect for Snape if she discovers he was also a victim in some way during the incident.
A possible way to develop their relationship is through a magical owl - related research project. Hermione, being the studious one, is eager to participate, and Snape is in charge. As they work on the project, they exchange ideas and arguments. Over time, Hermione starts to respect Snape's vast knowledge, and Snape begins to appreciate Hermione's fresh perspectives. This could transform their relationship from a hostile one to a more amicable one.
Most fans would likely condemn it. The fandom has a wide range of ages and backgrounds, and this type of content goes against the family - friendly and positive nature of the Potterverse. It would be considered a violation of the characters' integrity and the values that the series promotes, like respect and friendship.
The 'time - travel' trope is also quite common. For example, Hermione might go back in time and interact with a younger Snape, which can lead to all sorts of new storylines and character developments.