In such a fanfiction, Narcissa might be portrayed in a different light compared to the original books. She could be more sympathetic towards Harry. For example, she may see him as a way to redeem her family's name. Harry, on the other hand, would be dealing with his own feelings of confusion and attraction. The harem aspect could introduce other characters as well, each with their own motives and relationships to Harry and Narcissa, which would add layers of complexity to the story.
One possible story could be where Harry Potter, through some magical twist, finds himself in an unexpected situation with Narcissa in a harem - like setting. Maybe it starts with a spell gone wrong during one of his adventures that transports him to a hidden realm where Narcissa is part of a group that he has some sort of connection with. The story could then explore their relationship, how Harry adapts to this new and strange situation, and the dynamics within the harem.
There could be other pure - blood wizarding families' members in the harem. For example, a member from the Greengrass family. And then there might be some half - blood or even muggle - born characters who add diversity to the harem, each with their own motives and backstories that interact with Narcissa's plans and the overall story.
One interesting plot could be Narcissa trying to protect the harem members within the dangerous wizarding world of Harry Potter. Maybe she uses her influence and pure - blood status to shield them from dark forces.
You can try fanfiction websites like Archive of Our Own (AO3). It has a large collection of fan - created works, including many 'Harry Potter' - related fanfictions. There's a good chance you'll find some 'Harry Potter Narcissa harem fanfiction' there.
One popular 'Harry Potter Narcissa harem fanfiction' might be 'The Enchanted Circle'. It weaves a story where Narcissa is in a unique relationship dynamic. Another could be 'Narcissa's New World' which presents an interesting take on her character in a harem - like setting. There's also 'Mystical Bonds with Narcissa' that delves deep into the magical and relationship aspects.
A possible plotline could be that Harry, after the war, is magically bound to Narcissa for some reason. In the harem setting, other characters like Luna or Ginny could also be part of it. Harry has to figure out how to balance his relationships while also dealing with the post - war wizarding world. Narcissa might use her influence to protect Harry from those who still hold grudges against him.
There are many fanfictions on this topic. Some might explore how Narcissa's pregnancy would change her relationship with the Malfoy family and their stance in the wizarding world. It could also show how she might deal with the impending birth during the chaotic times in the story.
One great 'Harry Potter Narcissa fanfiction' is 'The Redemption of Narcissa Malfoy'. It shows a different side of Narcissa, exploring her inner thoughts and her journey after the war. It's a very character - driven story that gives Narcissa more depth than what we see in the original books.
I'm not sure if there is a specific fanfiction with such a plot. Fanfiction covers a wide range of themes and ideas, but this one seems rather unorthodox and might not be very common. There are many fanfiction platforms out there, but it's difficult to say for sure without a thorough search.
There's also 'Bellatrix, Narcissa and the Unseen Alliances'. This fanfic explores how the two sisters might have formed secret alliances or had different agendas during the wizarding war. It really brings out their individual personalities and how they interact with other characters from the series.
One interesting plot could be Narcissa secretly helping Harry Potter during the final battle. Maybe she realizes the true nature of Voldemort's regime and decides to act against it. She could use her position in the Death Eater families to pass on crucial information to Harry and his friends, adding a new layer of intrigue to the story.