Fanfiction often has a wide range of themes and interpretations. Instead of focusing on inappropriate or adult - themed concepts, you could look for fanfiction that focuses on the friendship or mentorship between Harry and Snape. For example, stories about how Snape secretly helps Harry improve his Potions skills in a more appropriate and platonic way.
I'm not aware of any such fanfiction. Fanfiction should generally adhere to appropriate and respectful content guidelines, and this description involves inappropriate and vulgar themes.
One possible plotline could be that Snape, in his secret attempts to rescue Harry, starts to see a different side of him. Maybe during a dangerous situation in the Forbidden Forest, Snape saves Harry from a dark creature. As they spend time together afterwards, they begin to understand each other's pain and pasts, and slowly romantic feelings start to develop.
Well, it could be that in this fanfiction, Snape is written in a way that endangers Harry's friends. Harry is very protective of his friends, so if Snape is portrayed as harming them in some way, Harry would likely try to destroy whatever it is that's causing the threat. Also, it could be related to some prophecy or hidden knowledge in the fanfiction that makes Harry believe Snape has to be stopped.
Well, perhaps Harry discovers Snape's dog has bitten someone. He might initially be reluctant to get involved but his sense of justice makes him step up. He could start by finding out how severe the bite is and then look for a way to clean the wound properly to prevent infection.
Their relationship develops in a very gradual way. First, it's just gratitude from Harry towards Snape for the rescue. But then, as they spend more time together, they start to notice little things about each other. Snape might admire Harry's courage in a different way, and Harry might see Snape's hidden kindness. Small gestures like Snape making Harry a special potion when he's ill or Harry giving Snape a token of appreciation start to build a romantic connection between them.
I'm not entirely sure specifically as there could be many different takes. But it might be a fanfiction centered around Snape and an imaginary fiend, perhaps exploring a made - up adventure or relationship within the Harry Potter universe.
I'm not entirely sure as it could be a very specific and perhaps less common fanfiction. It might be centered around the character Snape and some sort of concept related to 'fertile seed' which could be a very creative or symbolic idea within the fanfic's universe. Maybe it involves Snape's influence or actions leading to new beginnings or growth in some way.
It could make their relationship extremely hostile. Snape would likely be very angry at Harry for destroying something related to him, which would further strain their already tense relationship.