In the fanfiction, it could be that Harry is being psychologically abused by some of the teachers who are secretly under Voldemort's influence. Snape, who is a double agent, discovers this. He has to be careful not to blow his cover while trying to help Harry. He starts to subtly give Harry advice and tools to defend himself against this abuse, which in turn makes Harry question his previous perception of Snape.
One possible plot could be that Snape stumbles upon Harry being bullied by Draco and his cronies. Snape, despite his initial dislike for Harry, is appalled by the abuse. He then secretly starts to protect Harry from further harm, which gradually changes his view of Harry and leads to a more complex relationship between them.
Perhaps Harry is being abused by some dark magic creatures in a hidden part of Hogwarts. Snape, while on his nightly rounds, discovers this. He initially wants to use this as leverage against Harry but then realizes the severity of the situation. He uses his potions skills to create antidotes or protective charms for Harry, and this event starts to thaw the ice between them.
One possible plot could be that Snape, as Harry's uncle, tries to secretly train Harry in advanced magic. He does this because he wants Harry to be strong enough to face Voldemort, but he has to keep it a secret from Dumbledore and others in Hogwarts who might not trust his motives.
Well, one possible plot could be that Snape uses some kind of powerful magic to transform himself into a female form and becomes Harry's mother. He could have done this to protect Harry in a more direct way, perhaps knowing some dark prophecy about Harry. And then the story could follow Harry's growth with Snape as his mother, dealing with the secrecy of it all.
One possible plot could be that Snape discovers his relation to Harry early on. He then has to struggle with his feelings towards Harry. On one hand, he might feel a sense of family loyalty, but on the other, he still has his grudges and past issues. Harry, on his part, might initially be in disbelief but then start to see Snape in a new light. This could lead to them working together more closely to fight against Voldemort, with Snape being more open about his knowledge and skills to protect Harry.
Well, 'harry abuse discovered fanfiction' might center around the idea of finding out about abuse in the life of a character named Harry in a fan - created story. It could be that the author of the fanfiction is exploring themes of abuse that were previously hidden or unknown in the original story. For example, it could be set in the Harry Potter universe and deal with an aspect of abuse that was overlooked in the books. It could also be a completely different 'Harry' from another fictional world altogether.
One possible reason could be Snape's lingering resentment towards James Potter, Harry's father. Snape might see Harry as a reminder of the bullying he endured from James during their school days. So, he takes out his anger on Harry.
One plot twist could be that Snape is actually mentoring Harry on behalf of Dumbledore from beyond the grave. Maybe Dumbledore had some secret plan that he didn't get to fully execute, and Snape is now following through with it. Another could be that Snape discovers a new magical ability in Harry that no one else knew about.
Perhaps Snape finds Harry drunk in a secluded part of the Hogwarts grounds. Snape, being strict, would likely want to punish Harry according to the school rules. However, he might also be secretly concerned about what led Harry to this state. He could start an investigation into whether someone influenced Harry to drink or if Harry was dealing with some personal problems that drove him to this. This could lead to a series of events where Snape and Harry have more interactions than usual, and Snape might even end up protecting Harry from any potential backlash within the school.
Well, it could be a rather strange plot. Maybe it's a situation where Harry is injured and Snape has to hold him in this way for some kind of magical healing process. Harry might be in a weakened state and Snape, despite their past differences, has to take care of him. This could lead to an unexpected moment of understanding between them.
In this fanfiction, Harry might stand up to Snape's abuse by using his wits. He could expose Snape's unfair treatment in front of the other professors. For example, he might gather evidence of Snape's partiality in grading or his excessive use of punishments towards Gryffindors. By presenting this evidence to Dumbledore or other authority figures, Harry would be taking a stand against Snape's abuse.
The plot might start with a magical experiment gone wrong. Harry ends up with a special mark or power that makes him Snape's master. As the story progresses, Harry uses this power to make Snape teach him advanced potions and dark arts defenses. Snape resents it but has no choice. Meanwhile, Voldemort senses this strange new power dynamic and tries to use it to his advantage. This forces Harry and Snape to work together in ways they never thought possible to outwit Voldemort while also dealing with their own difficult relationship.