Hermione is often a popular character. She can play the role of the mediator or the one who tries to figure out what's really going on between Harry and Severus. For example, she might notice the strange new dynamic between them and try to use her intelligence to uncover the truth.
Another great one is 'A New Understanding'. In this fanfic, the author focuses on the emotional journey of both Harry and Severus. It shows how their relationship evolves from mutual distrust to something more profound. There are some really interesting scenes that highlight their individual personalities and how they complement each other.
Another aspect is the emotional journey. Since Harry has had such a complex life filled with trauma and growth, and Albus Severus is starting his own journey at Hogwarts, their relationship in fanfictions can be a source of emotional support for both. It can be about them learning from each other, facing challenges together, and evolving as characters within the fictional world of Harry Potter.
One common theme is power dynamics. Given that Tom is often associated with a thirst for power, and Lucius also has his own sense of power within the wizarding world, and Severus has his own influence in different ways, and of course Harry is the Boy Who Lived with his own power. How they balance, compete, or share power among themselves is often explored.
One common theme is the struggle between light and dark. Harry, as a vampire, often has to grapple with his new, darker nature while Severus represents the more complex side of the magical world. Their relationship becomes a battleground for these opposing forces.
A strong plot is also essential. It can't just be a random collection of scenes. There should be a clear progression, like starting from their initial animosity and gradually leading to a more positive relationship. Maybe there are some external threats or challenges that bring them closer together.
In this type of fanfiction, the setting might be a Hogwarts transformed into a more enchanted and isolated place, like the castle in the Beauty and Beast story. Harry could be initially afraid of Severus in his 'Beast' form but gradually come to understand him. Their interactions could involve Severus trying to protect Harry in his own way while also being gruff and difficult. The story could also play with the idea of magic being used to break the curse, much like in the original fairy - tale.
The plot could center around Severus and Harry's relationship as they go to the ruins. They could start off not trusting each other much, but as they explore the ruins, they begin to understand each other better. There might be some mystery in the ruins that they need to solve together, which forces them to cooperate and in the process, their relationship evolves.
The theme of self - discovery is also present. Harry may discover new aspects of himself through his relationship with Severus. And Severus, as a vampire, might be on a journey of self - acceptance. These fanfictions often show how their relationship helps them both grow as characters and understand themselves better.
I'm not really into that particular ship's lemon fanfictions. However, you can try searching on some popular fanfiction websites like Archive of Our Own. They usually have a wide variety of fanfictions and might have what you're looking for.