Novela negra basically means a type of novel that focuses on crime and mystery. These novels usually have a lot of twists and turns to keep readers engaged and guessing until the end.
In a fanfiction like this, Hermione as a teacher might be at Hogwarts. She could start a special project about magical creatures and their place in society. Remus, being a werewolf, has a unique perspective. They might collaborate on this project, and during the process, their relationship deepens. The story could also involve some challenges from the more traditional teachers who are skeptical of Hermione's modern teaching methods.
Hermione could react by using her intelligence to expose Fleur's betrayal. She might start gathering evidence of what Fleur has done wrong and present it to their mutual friends or to an authority figure in the wizarding world.
One possibility could be that Hermione's intelligence would blend really well with the Avengers' skills. She could use her vast knowledge of magic to assist in situations where the Avengers' technology or brute force might not be enough. For example, she could use spells to disable high - tech security systems during a mission or heal the Avengers' wounds more quickly than normal medical means.
In a fanfiction with this theme, it could be set post - war. Draco and Hermione find themselves in a situation where they are on the run from some dark wizards who are after them for different reasons. During their escape, Hermione gets wet and cold. Draco, having a change of heart after the war, gives her his warm cloak. This act of kindness begins to break down the barriers between them, and they start to have deeper conversations, realizing they have more in common than they thought.
Perhaps there's a fanfiction where a powerful and dark wizard from outside the school is targeting Muggle - borns. Hermione, being a Muggle - born, is understandably afraid. Draco, who has always had a complex relationship with Hermione, is conflicted. He doesn't want to see her hurt because, deep down, he has feelings for her. He ends up using his Slytherin cunning to outwit the dark wizard and keep Hermione safe.