Snape could begin by apologizing for his past behavior towards Harry. This would be a huge step in gaining Harry's trust. Then, he could start mentoring Harry in a more positive way. He could share his own experiences of dealing with dark magic and difficult situations. Snape could also introduce Harry to some of his old contacts or resources that could be useful for Harry's development. For instance, some old books or spells that are not commonly known but could help Harry become stronger both magically and emotionally.
Snape might simply sit with Harry in silence for a while. Just his presence could be reassuring to Harry. After some time, Snape could start a conversation, asking Harry what is wrong in a more empathetic tone than usual. This gradual approach could help Harry calm down.
One possible motive could be that Snape is still deeply influenced by his loyalty to Voldemort in this fanfiction. Maybe Voldemort has some hold over him that forces him to do the unthinkable. Another reason could be a misunderstanding. Snape might believe that Harry has turned to the dark side or is about to, and he decides to take preemptive action to stop what he thinks will be a great evil.
One possible plotline could be that it's the result of some dark magic gone wrong. Maybe a spell was cast on Harry by an enemy of Snape's to embarrass him, and now they have to deal with the consequences together. Another could be that it's part of a prophecy that no one expected, and they must figure out how it fits into the wizarding world's future.
One possible plotline could be Harry being sold due to some dark magic plot against him. Snape then has to deal with this unexpected situation and protect Harry from further harm. Another could be that it's a part of a deal to save the wizarding world, and Snape and Harry must learn to work together in this strange new dynamic.
Another plotline could be that there is a spell or a magical occurrence that forces Snape and Harry to be close to each other. Initially resistant, Snape eventually gives in and cuddles Harry. This could then be the start of a journey where they learn to trust and rely on each other more.
Well, one possible plotline could be that Snape is examining Harry for some sort of magical ability or deficiency that he suspects. Maybe he's trying to figure out why Harry has such an affinity for certain spells. Another could be that Snape is examining Harry as part of a school investigation, perhaps related to some mischief that's been going on. And it could also be that Snape is secretly examining Harry to protect him from some hidden danger in the wizarding world.
One way could be through meditation. In fanfiction, Harry might have learned some advanced meditation techniques from the Hogwarts library or from a mysterious wizard. By meditating, he can clear his mind and create a mental shield against nightmares.
One possible plot could be that Snape suspects Harry and Draco of being involved in some sort of dangerous or forbidden magic experiment. In his frustration and concern for their safety and the safety of the school, he decides to take a very strict approach. However, this would require a lot of character development and deviation from the original character traits to make it somewhat believable in the context of the Harry Potter universe.
A plotline might involve a dark magic situation where Snape has been cursed and Harry, as his donor, is the only hope to break the curse. As Harry gets involved, he uncovers secrets about Snape's past that change his perception of him. Meanwhile, Snape has to deal with his pride and accept help from someone he has long disliked, leading to a complex emotional journey for both characters.
Well, it could start with a dream or a prophecy. Harry has a strange dream about Snape that he can't shake off. He starts to observe Snape more closely in real life and realizes that there's more to him than he thought. Meanwhile, Snape notices Harry's change in behavior towards him. As they interact more, they find common ground in their love for magic and their shared experiences of loss. This mutual understanding could lead to a situation where Harry, driven by his new - found respect and affection, kisses Snape. It's a very different take on the relationship between the two characters compared to the original story.