In the fanfiction, it might also be about their relationship evolving. Ron staying at Hermione's side could symbolize his growing understanding of her. He starts to appreciate her more deeply, and they have long conversations about their dreams, fears, and the future. As they spend more time together, their friendship could potentially turn into something more romantic.
Obviously, Ron and Hermione are the main characters. Ron, with his red hair and freckles, is the loyal friend who decides to stay by Hermione's side. And Hermione, the brilliant witch with her bushy hair and vast knowledge, is the one he's staying with.
In the 'hermione stays with the malfoys fanfiction', perhaps Hermione is on a secret mission and has to hide in the Malfoy manor. She might initially be met with hostility from the Malfoys, but as time passes, she discovers that they have more in common than she thought. Draco, for example, could be struggling with his family's dark past and Hermione's presence might help him come to terms with it.
Well, it could be about their simple daily life at the Burrow. Maybe they are helping Mrs. Weasley with the housework, and there are some cute and funny moments between them, like Ron accidentally messing up a spell while trying to assist Hermione in cleaning the dishes.
She might drive the Dursleys crazy with her intelligence and magic knowledge. For example, she could accidentally use magic in front of them while trying to solve some household problems, which would surely shock them as they are so against magic.
Maybe Ron accidentally ruins Hermione's important experiment in the wizarding lab. In the fanfiction, Hermione could get revenge by getting all their mutual friends to side with her in an argument. She could present all the facts about how Ron's carelessness has cost her time and effort, making Ron feel isolated and guilty.
One possible plot could be the challenges they face as new parents. Maybe they struggle to balance their duties at the Ministry (assuming they work there) with taking care of the baby. For example, they might have to deal with sleepless nights and still be on top of their work.
It could be that Ron and Hermione abandon Harry due to a prophecy that they misinterpret. They believe that by being with Harry, they will bring doom to the wizarding world. So they go into hiding. Harry, on the other hand, is determined to change the course of the prophecy. He embarks on a journey to find the truth behind it, all while feeling the pain of his friends' desertion. He has to fight against dark forces that are taking advantage of the situation.
In such a fanfiction, it might be that Harry and Ron are influenced by a powerful dark spell. This spell makes them see Hermione as a threat, so they abandon her. Hermione then has to find a way to break the spell's influence on them while also dealing with the loneliness and danger she's now in. She could seek help from other Hogwarts students or even some friendly magical creatures.
Well, perhaps in the fanfiction, Ron and Hermione go on adventures outside of the UK. They could be exploring new magical cultures and using their combined skills. Hermione's vast knowledge and Ron's practical magic skills would make them a great team. They might also be starting a family and facing the difficulties that come with raising magical children in a world that's still recovering from the war.
Perhaps in the fanfiction, Cormac invites Hermione to a secret gathering, but his intentions are not so noble. Ron finds out and races to the location to save Hermione. This act of heroism by Ron might make Hermione question her feelings for him. She might start to see him as more than just a friend, especially if Ron shows a side of himself that she hasn't fully appreciated before. The story could then follow how their relationship evolves from this event.