One interesting story could be where Snape and Harry form an unexpected bond during a dangerous adventure in the Forbidden Forest. They start to understand each other's motives and past traumas, and together they face a new dark threat that the wizarding world has not seen before.
One interesting fanfiction could be about Snape secretly mentoring Harry outside of Hogwarts. In this story, Snape realizes the importance of Harry's role in the wizarding world and decides to give him extra training in potions and defense against the dark arts without Dumbledore's knowledge. It shows a different side of their relationship, less adversarial and more collaborative.
There are fanfictions that focus on Snape's role in the wizarding war from a different perspective. For example, how he secretly influenced certain events to protect Harry without anyone really knowing. He could have been involved in undercover operations that are not mentioned in the original books.
There's 'Snape's Hidden Alliance'. In this fanfiction, Snape forms an unexpected alliance with a character that turns into a very special kind of friendship. The story is full of twists and turns as they face various challenges together in Hogwarts. It also gives some interesting insights into Snape's past that you might not have considered before.
It's popular because it offers a different perspective on the relationship between two very complex characters. People are intrigued by the idea of these two characters, who had a lot of animosity in the original series, coming together as mates.
One popular 'Harry Potter and Severus Snape' fanfiction might be those that explore their complex relationship in a more positive light. For example, some stories could focus on Snape's hidden kindness towards Harry that was not fully shown in the original books. They might rewrite certain scenes to give more depth to their interactions.
One interesting plotline could be Snape and Harry having to work together on a secret project for Dumbledore. They start off distrusting each other but as they face challenges, they gradually become friends. For example, they might be researching a powerful dark magic spell that Voldemort is after, and in the process, they learn about each other's past traumas and start to empathize.
Some fanfictions have a plotline where Snape survives the Battle of Hogwarts and he and Harry have to deal with the aftermath together. They might have to face the wizarding community's reaction to Snape's past actions and also work on rebuilding Hogwarts. There are also stories where Harry, while still at school, starts to understand Snape's difficult position between Dumbledore and Voldemort and tries to help him in some way, which creates a whole new dynamic between them.
One interesting plot could be Snape raising Harry while secretly training him in advanced potions and dark arts defenses. Harry would grow up with a different perspective on Snape, seeing him as a strict but caring father figure. Another plot might involve Snape having to protect Harry from other dark wizards who suspect Harry's true potential. This could lead to some intense magical battles and Snape using his knowledge and skills to keep Harry safe.
One interesting plotline could be Harry growing up with Snape's guidance and inheriting his potions skills at an early age. He might have a different dynamic with the other Hogwarts students, being more of an outcast due to his connection to the often - misunderstood Snape.
A really unique plot could be Snape adopting Harry during a time when Voldemort is still a threat. Snape has to balance protecting Harry from Voldemort's followers and also from the prejudice within the wizarding community. He might train Harry in Occlumency more intensively, and in the process, they develop a deeper understanding of each other. Harry starts to see Snape not as the mean professor but as a complex person with his own traumas and reasons for his actions.