One common theme could be young love. Since it's set in highschool, Nalu's relationship would be in its budding stage. Another theme might be friendship groups and how they influence Nalu's relationship.
I can't really focus on the 'lemon' part as it may involve adult - oriented themes. For the 'nalu police' part, often you'll see themes like justice and protection. Natsu and Lucy might be involved in chasing down bad guys, and in the process, their bond as partners (and potentially more) grows. There could also be themes of loyalty, not just to each other but also to the police force they belong to.
Another theme might be the unexpected situations that occur due to their drunken state. For example, they could end up in a place they've never been before or get involved in some comical misunderstandings. Also, the 'lemon' aspect might imply a bit of a more mature exploration of their relationship, like a new level of physical closeness or attraction that is explored in a tasteful way in the story.
One common theme could be the development of an unexpected relationship. For example, in a Nalu teacher - themed fanfiction, there might be the exploration of how Natsu and Lucy, if in a teacher - student type of dynamic (even if not traditional in a sense), grow closer. Another theme could be the over - coming of obstacles. Maybe there are rules against their relationship in the story's setting, and they have to fight against those. Also, self - discovery can be a theme, as they learn more about themselves through their interactions with each other.
A common theme is the magic of Christmas combined with their love. The Christmas setting can create a more romantic and cozy atmosphere for Nalu. The lemon aspect might bring in some elements of their more private and passionate side. For example, they could have a private Christmas dinner and then some tender moments that are a bit more on the steamy side. There could also be themes related to hope and new beginnings, as Christmas is often seen as a time for that, and their relationship could be evolving in that context.
One common theme could be the exploration of the passionate relationship between Natsu and Lucy. Since it's 'rough lemon', there might be a focus on more intense physical interactions within their relationship.
A frequent theme is the development of the main character, often Issei. In 'highschool dxd lemon fanfiction', his journey of self - discovery and growth is often accompanied by his romantic and sexual encounters. His relationships with the female characters not only shape his character but also contribute to the overall plot. The 'lemon' parts usually serve to intensify these relationships and show a more private side of the characters' interactions. Another common theme is the power struggle within the different factions of the Highschool DxD world, which can also influence the relationships and add drama to the fanfiction.
Well, it depends on your personal taste. Some popular fanfiction websites might have 'Nalu Highschool' stories. However, 'lemon' often implies mature content in fanfiction. If you're looking for clean and interesting Nalu highschool fanfictions, focus on those with high ratings and positive comments. Maybe check out the works of well - known fanfic authors in the Fairy Tail fandom, as Nalu is from Fairy Tail.
Many of these fanfictions might also focus on the supernatural elements that are characteristic of Highschool DxD. For example, Irina's angelic nature could be a central part of the story, with themes related to her powers and how they interact with the other supernatural beings in the story. This could lead to interesting plotlines where she has to use her powers in unexpected situations within the fan - created scenarios.
The anticipation of the new life is another theme. Writers often describe how they both look forward to the arrival of their baby. They might dream about the baby's future or argue about baby names.
One common theme is domestic bliss. Writers often explore how Natsu and Lucy create a warm and loving home together. For example, they might show Natsu bringing home little trinkets for Lucy or Lucy cooking a special meal for Natsu.