Perhaps the Muggle teacher is brought to Hogwarts to teach a special class about Muggle culture. Hermione is excited as she loves learning about Muggles, Ron is a bit skeptical, and Harry is just amused. Chaos ensues as the Muggle teacher tries to adapt to the magical environment and the students' reactions.
In a fanfiction, the Muggle teacher could be a relative of one of the trio. Let's say the teacher is Hermione's distant cousin. When Hermione, Ron, and Harry visit the teacher during the holidays, they discover that there are some strange magical occurrences around the teacher that they need to figure out. This could lead to a mystery - solving adventure.
One idea could be that a Muggle teacher accidentally stumbles upon the wizarding world while Hermione, Ron, and Harry are on a mission near a Muggle area. The Muggle teacher could initially be in shock but then become intrigued and start helping them in unexpected ways, like using Muggle technology to solve a magical problem.
A possible plot could be that the Muggle teacher is being targeted by a dark wizard who wants to use the teacher's knowledge of Muggle technology for evil purposes. Hermione, Ron, and Harry find out and decide to protect the teacher. They have to hide the teacher in the wizarding world and teach them basic self - defense spells.
One idea could be a story where Hermione and Draco are paired up for a special project at Hogwarts. They start off hating each other as usual, but as they work together, they begin to understand each other better. Harry could be suspicious at first, but then realizes that their newfound friendship could be beneficial for the wizarding world. For example, Draco might share some Slytherin secrets that help in a battle against the dark forces.
One idea could be a time - travel fanfiction where Hermione goes back in time and has to face Bellatrix in a magical duel. Harry could be caught in the middle, trying to protect Hermione. Maybe Bellatrix has a secret that could change the course of the wizarding war, and Hermione discovers it.
One idea could be a time - travel fanfiction where Ron, Hermione and Harry go back in time to the founding of Hogwarts. They could interact with the four founders and influence the early history of the school.
One idea could be a time - travel fanfiction where Harry, Hermione, Neville and Luna are sent back in time to the era of the Marauders. They could interact with James, Sirius, Remus and Peter, and perhaps change some of the events that led to the downfall of the Marauders. For example, they could prevent Peter from betraying his friends.
One characteristic is the exploration of the Muggle world. Since Harry and Hermione are from the wizarding world, seeing them interact with Muggle elements like technology, different social norms, etc., is quite interesting. For example, they might be confused by a simple Muggle gadget at first.
One idea could be that Hermione invites her Muggle friends to a magical place for the reunion. They could be amazed by the wonders of the wizarding world, like seeing Hogwarts for the first time. Hermione would have to explain all the magical things around them, and there could be some funny misunderstandings as her Muggle friends try to adjust to this new and strange environment.
There's 'Ron and Hermione: The Muggle Years'. This fanfiction focuses on their time spent in the Muggle world, perhaps during a summer break. It has a lot of cute and funny moments as they try to adapt to Muggle life, like using a toaster for the first time or riding a bicycle. It's a light - hearted take on their relationship.
One idea could be to focus on how they prepare for the baby. For example, Ron might be clumsily trying to assemble a crib while Hermione reads all the parenting books she can find. Another idea is to explore how their friends react. Harry could be super excited and start giving them all sorts of baby - related gifts. And Ginny might offer Hermione some motherly advice based on her own experience with her son.
The idea of mixing the magical and the non - magical (muggle) is really appealing. In these fanfictions, we can see how Harry and Hermione's magic can be used in the muggle world or how their muggle - born knowledge can impact the wizarding world. For example, they might use muggle technology to enhance their magic or use magic to solve muggle - like problems in a unique way. This contrast creates interesting stories.