One possible storyline could be that Shinji and Sakura Matou are from different social classes in the game's world. They meet by chance and initially have a lot of misunderstandings due to their different backgrounds. But as the story progresses, they start to understand each other and work together to overcome the social barriers in their world.
I'm not very familiar with this visual novel specifically. However, in general, a visual novel without the inappropriate H scenes can often focus more on the story, character development, and the overall world - building. It might explore the relationship between Shinji and Sakura Matou in a more platonic or story - driven way, perhaps delving into their personalities, their pasts, and how they interact within the context of the game's setting.
They are interesting because they offer a new take on the relationship between Naruto and Sakura. It allows fans to explore different scenarios that might not have been possible in the original story.
Some fanfictions might focus on an alternate universe where Naruto and Sakura Matou have different abilities or roles. For example, Sakura Matou could have a unique power related to her family's secrets, and Naruto has to help her control it while also dealing with threats from those who want to use her power for evil.
I'm not sure specifically about 'Naruto and Sakura Matou lemon fanfiction' as 'Matou' is from a different series (Fate/stay night) and mixing it like this might be a very niche or even non - existent concept in a proper fanfiction context. There could be some very strange crossovers out there, but it's not a common or widely - known combination.
Since this is a very odd combination, it's hard to say exactly. But perhaps it would involve some sort of strange crossover where the worlds of Naruto and Fate/stay night collide, and Naruto and Sakura get involved in a situation related to the Matou family in a romantic or sexually - tinged way, though this is really stretching the boundaries of normal fanfiction concepts.
Harry's magic is mainly based on incantations and the use of a wand. Sakura's magic, especially as Dark Sakura, is more instinctual and connected to her very being. Their powers could interact in a way that Harry's spells could act as a sort of catalyst for Sakura's power. For example, if Harry casts a spell of protection around them, it could enhance Sakura's ability to focus her dark magic without it going out of control.
Another plot could involve a magical tournament that somehow brings Harry Potter and Dark Sakura Matou together. They are forced to compete against each other at first but then realize that there is a greater conspiracy behind the tournament. They then join forces, with Sakura's dark magic and Harry's quick thinking and diverse spellcasting abilities becoming a formidable combination to uncover the truth and defeat the real villains behind the scenes.
I don't have the specific information about the main characters in sakura sakura visual novel. But usually, in a visual novel, there could be a protagonist who drives the story forward, and then there might be friends, love interests, or rivals around the protagonist.