One consequence could be a change in the public's perception of Hermione. Some might see her as a hero for standing up against an unjust imprisonment, while others might view her actions as traitorous, especially if they believe Draco was truly guilty. This could create a divide among the wizarding community.
One possible fanfiction could involve Harry finding out that Draco was wrongly imprisoned in Azkaban. Harry might use his influence and his skills as an Auror to dig deeper into Draco's case. He could discover evidence that clears Draco's name, like finding out that Draco was framed by some dark wizards who wanted to get rid of the Malfoy family's influence. Then, Harry would have to fight against the bureaucratic system of the Ministry of Magic to get Draco released.
One possibility could be that Draco and Hermione realize Severus is in danger due to some dark magic plot. They might put aside their differences because they both understand Severus's importance. Hermione's vast knowledge of magic combined with Draco's insider knowledge of the Death Eaters' ways could lead to a unique rescue plan.
Maybe Draco discovers that Severus is being framed for a crime he didn't commit. He then approaches Hermione for help as she is known for her intelligence and problem - solving skills. Together, they start to gather evidence to clear Severus's name and also protect him from those who want to harm him.
Hermione might become more morally ambiguous. Normally she is a very just and rule - following character, but by tricking Draco into Azkaban, she steps into a grey area. She could start to question her own actions and feel guilty.
Well, perhaps Hermione discovers some dark secret of Draco's that she can use as evidence to frame him for a crime, leading to his incarceration in Azkaban. Maybe it has something to do with his family's past actions that she twists to make him look guilty.
For Harry, his friends in Gryffindor could be a bit confused at first. They know Draco is not exactly a friendly character. But overall, it could lead to a more united front against real threats in Hogwarts. The teachers might also take notice. Dumbledore, for instance, would probably be proud of Harry for showing such selfless courage, regardless of who he was saving.
In this kind of fanfiction, it could happen in various ways. Maybe Hermione discovers some evidence that Draco was wrongly accused. For example, she might find that certain spells were cast on Draco to make him seem guilty when he actually wasn't. So she uses her intelligence and knowledge of magic to expose the truth and save him from Azkaban.
The wizarding world would be in shock. The Malfoys are known for their dislike of the Potters, so Draco saving Harry would go against the family's reputation. It could lead to Draco being ostracized by some in the pure - blood community.
In the Hogwarts hierarchy, things would change. Hermione is often seen as a bit of an outcast by some Slytherins because she's a Gryffindor. Draco, now in her body, would face a different kind of discrimination or at least a lot of strange looks from his own housemates. He would also have to deal with Hermione's reputation among the teachers. Some teachers might expect the same level of knowledge and participation from 'Hermione' (who is actually Draco), and he would struggle to meet those expectations.
On the other hand, it could also lead to a change in their relationship. Draco might start to respect Hermione's boldness and intelligence. He could realize that his own behavior has been rather childish, and this could be a turning point in the fanfiction where they start to understand each other better, albeit reluctantly at first.