Well, perhaps the plot could be that a muggle accidentally stumbles into the wizarding world where Voldemort is still a threat. The muggle might initially be terrified but then discovers some hidden power within themselves that could potentially help in the fight against Voldemort.
The plot might involve a muggle who is an amateur historian. While researching some old ruins, he uncovers a magical portal that leads him right into the heart of Voldemort's lair. He is then forced to use his wits and knowledge of the muggle world to outsmart Voldemort. Maybe he finds a way to disrupt Voldemort's dark magic using simple muggle technology or ideas that the wizards have overlooked. This would be an interesting take on the 'a muggle meets voldemort' concept.
The main character could be a young muggle girl who is very curious. She might be the type who is always exploring old abandoned places. One day, she wanders into a place that has a connection to the wizarding world and that's how she meets Voldemort.
One interesting plot could be a Muggle accidentally stumbling upon Voldemort's lair. The Muggle, being completely out of their element, has to use their wits and non - magical skills to survive the encounter. Maybe they manage to trick Voldemort into thinking they have some sort of hidden magical power.
The Muggle characters can also become popular. For instance, a brave and intelligent Muggle who stands up to Voldemort. This kind of character gives the readers a sense of hope and shows that even without magic, one can be a hero. They often bring a fresh perspective to the magical world that Voldemort is a part of.
In this kind of fanfiction, Snape might be initially very confused and on guard when meeting a Muggle. He could be out of his comfort zone in the wizarding world and struggle to interact with someone who has no knowledge of magic.
In this fanfiction, Snape might initially be quite distrustful of Cecilia as she is a Muggle. He could be on guard, perhaps even a bit rude at first. But as the story unfolds, he might discover that Cecilia has qualities he didn't expect, like kindness and an open - mindedness that start to break down his prejudices.
A lot of these fanfictions also explore Snape's internal struggle. He has his own prejudices about Muggles, and meeting one face - to - face makes him re - evaluate those beliefs. There could be a moment where he has to decide whether to trust the Muggle with his secrets or keep his distance. This internal conflict can drive the plot forward as he tries to figure out how to deal with this new situation and person in his life.
One possible plot could be that Remus tries to keep his wizarding world a secret from his Muggle spouse at first. But as time goes on, small magical incidents start to occur around the house, and he has to come clean. Then they face the challenges of the Muggle - wizard divide together.
Perhaps in this fanfiction, Harry marries a Muggle who has some unique qualities. For example, she might be an artist who sees the world in a very different way. Harry is attracted to her creativity and her non - judgmental attitude towards his wizarding abilities. The story could revolve around how they build a life together, with Harry having to keep his wizarding side a bit of a secret from the Muggle world, but also sharing some magical experiences with her in a very private way.
One possible plot could be that Draco, after the war, has a change of heart. He meets a Muggle by chance. At first, he's conflicted because of his pure - blood upbringing. But as he gets to know her, he falls in love. Their relationship faces challenges from both the wizarding world that looks down on Muggles and the Muggle world that doesn't understand magic. Eventually, they overcome all these and get married.
One possibility is that Harry is being bullied at the Muggle school, and Hermione stands up for him. She's smart and brave, even at a young age. This act of kindness makes them friends. They then might start to suspect that there's something more to their world than just what they see in the Muggle school. They could begin to exchange stories about their families and how they feel like they don't quite fit in, which eventually leads them to discover their true identities as wizards.