A possible plot development could be that Snape's rescue of Harry is part of a larger plan. Maybe Snape has been working behind the scenes to protect Harry all along, and the rescue is the culmination of his efforts. As they get closer, they discover that they have more in common than they thought. They could start to explore the wizarding world together from a new perspective, with their relationship evolving as they face various challenges, such as dark magic threats or political unrest in the wizarding world. Their love story could be intertwined with the fate of the wizarding world, making it a story not just about their relationship but also about their role in the greater scheme of things.
In this fanfiction, after Snape rescues Harry, the plot might take a turn where they have to keep their new - found relationship a secret. They could face opposition from the wizarding community due to their different standings and the unconventional nature of their relationship. This secrecy could add an element of mystery and drama to the story. They might also have to deal with their own internal struggles, like Snape's guilt over his past actions towards Harry and Harry's confusion about his new feelings for Snape.
In a gay romance fanfiction where Snape rescues Harry, the rescue could be both physically and emotionally. Physically, Snape might save Harry from a dangerous spell or a life - threatening situation. Emotionally, it could be Snape rescuing Harry from feelings of isolation or self - doubt. This could lead to a beautiful relationship where they support and love each other, perhaps defying the norms of the wizarding world.
One common theme is redemption. Snape, who has had a rather dark past in the original series, through rescuing Harry, finds a path to redemption and love. Another theme is the breaking of barriers. They come from different generations and have had a somewhat antagonistic relationship in the books, but in the fanfiction, the rescue event allows them to break those barriers and form a romantic bond.
The plot might involve Harry being in the rent boy business not entirely by choice. He could be under some sort of spell or coercion. When he sees Snape in trouble, it could be a turning point for him. Snape, on the other hand, might initially be shocked to be rescued by Harry, but then realizes that Harry has more to him than meets the eye. They could then form an unlikely alliance to deal with the underlying threats in London's wizarding underworld.
The plot twist could be related to Snape's true motives. He might be under an Unbreakable Vow to rescue Harry from the Dursleys. In the process, Harry realizes that Snape is not as bad as he seems. This could lead to a complete change in their relationship. Harry could start to trust Snape, and Snape, in turn, could teach Harry some unique magic that he has never learned before, which is crucial for the upcoming battle against Voldemort.
In some fanfictions, Snape might rescue Harry out of a sense of duty. Snape has always had a complex relationship with Harry. He could rescue Harry from a Dark Magic attack. Maybe he realizes that Harry is crucial in the fight against Voldemort and despite their personal differences, he steps in to save him. This could also be a turning point in their relationship, leading to a more understanding and less hostile dynamic between them.
Perhaps Snape discovers some dark plot involving the Dursleys that could harm Harry more than he initially thought. The Dursleys were known to be cruel to Harry, and Snape might have found out that they were involved with some Death Eaters or dark magic users who planned to use Harry in a harmful way. So, he decides to rescue Harry to prevent this from happening.
Well, in some fanfiction scenarios, Snape might rescue Harry from Azkaban because he discovers new evidence that clears Harry's name. Maybe he uncovers a dark plot by some other powerful wizard who framed Harry, and his sense of justice, despite his past animosity towards Harry, drives him to act.
There's a fanfiction titled 'A Different Kind of Rescue'. It shows Snape saving Harry in a rather unexpected situation. As the story progresses, their interactions become more frequent and the chemistry between them builds up in a very believable way. It's a great read for those who like this kind of pairing in the Harry Potter universe.
The plot could develop with Harry initially being suspicious of Snape's help but gradually realizing Snape's true intentions.