One interesting plot is that they are suddenly made Masters of Death and they don't know how or why. They start having strange dreams and visions that lead them to believe that there is a greater purpose to their new status. They then begin to investigate, and find out that an ancient prophecy predicted their rise as Masters of Death and that they are meant to save the wizarding world from an impending doom that no one else can see coming.
A plot could be that Harry and Hermione are the only ones who can reverse the effects of a dark curse that is slowly killing all wizards. As Masters of Death, they must travel to the underworld and bargain with Death itself to get the cure. Along the way, they face many trials and learn more about the true nature of life and death.
One interesting plot could be that Harry Potter, as the Master of Death, encounters Aphrodite in the wizarding world. Maybe Aphrodite is intrigued by the concept of death in the wizarding realm and wants to learn more. Harry, in turn, is fascinated by her powers of love and beauty. They could team up to help a young wizard who has lost all hope and love due to a dark magic curse, with Aphrodite using her love - inducing powers and Harry using his mastery over death to free the wizard from the curse's hold on his soul.
One possible fanfiction could be where Harry and Hermione discover the secrets of becoming the Master of Death together. They might go on a journey to find the three Deathly Hallows in a different order than in the original story. Maybe they find the Resurrection Stone first and use it to communicate with past wizards who can guide them on their path to master death.
One possible plot could be Hermione's internal struggle. She is a strong - willed character, so being betrothed to a Death Eater would go against all her beliefs. She might try to find a way to break the betrothal while also having to deal with the Death Eater's family and their dark magic - influenced ways. For example, she could be constantly trying to outwit them in a battle of wits, using her intelligence to avoid any dark magic they might try to force on her.
A common plot in such fanfictions is the idea that death has a plan for Harry that goes beyond what Dumbledore or anyone else expected. It could be that death wants to use Harry to balance the magical world in a different way. So, Harry might be led to discover ancient magic that is related to life and death, and he has to decide how to use it. This could involve making alliances with creatures that are associated with death, like thestrals or dementors in a different context.
A possible plot is that Hermione, as a succubus, discovers a connection between her new form and an ancient magic in the wizarding world. Harry and Hermione then team up to explore this connection and in the process, they uncover secrets about the origins of magic that were long forgotten. This could involve delving into ancient texts and visiting mysterious places.
One interesting plot could be them exploring the wizarding world together as a married couple, solving mysteries that were overlooked in the original books. For example, they might discover a hidden chamber in Hogwarts that has secrets related to ancient magic.
One interesting plot could be Harry and Hermione getting married and having to deal with the challenges of raising a magical family in a post - Voldemort world. They might face issues like how to educate their children about the dark past while still letting them enjoy their magical abilities.
Well, in some 'Hermione and Harry Dark Fanfiction', there might be a plot where they enter a dark, alternate magical realm. In this realm, they have to rely on their friendship and skills in new ways. They could encounter dark versions of their friends and have to fight against them, which would really test their loyalty to each other.
One interesting plot could be them facing challenges from the wizarding world that doesn't fully accept their union. For example, some pure - blood families might oppose it. Another could be their adventures as a married couple, like exploring new magical places together.
Perhaps in the fanfiction, Hermione and Harry get married due to a magical bond that forms between them after a dangerous encounter with a dark wizard. In their married life, they work together to reform Hogwarts' curriculum, incorporating more Muggle - friendly and practical magic. They face opposition from some traditional pure - blood families but overcome it with their combined wisdom and courage.