The plot could revolve around how they prepare for the baby. Since Draco has some knowledge of the wizarding world's traditions, he might want to follow certain pure - blood customs for the pregnancy and birth. Luna, on the other hand, would want to do things in her own, more natural and spiritual way. This could lead to some humorous and also heartwarming moments as they try to combine both their ideas.
Perhaps the pregnancy is a result of a magical accident. In the wizarding world, strange things can happen. They could then be on a quest to find a way to ensure the health of the unborn child. Along the way, they might discover new spells or potions that are related to pregnancy in the wizarding world. They also have to deal with the gossip and rumors in the wizarding community, which adds to the drama of the story.
One idea could be that they discover their pregnancy unexpectedly. Maybe they were friends who gradually fell in love and now have to deal with the new life coming. They might face challenges from their different backgrounds. Draco from a more traditional pure - blood family and Luna with her unique, free - spirited ways. Their friends could have mixed reactions, some being supportive while others being skeptical.
One possible plot could be that Draco and Luna, as twins, are separated at birth due to some dark family secret. Draco grows up in the Malfoy household, influenced by the pure - blood supremacist ideals, while Luna is raised in a more eccentric and free - spirited environment. As they reach Hogwarts age, they start to discover strange similarities between them and begin to suspect that they are related. Eventually, they team up to uncover the truth about their past and in the process, they also change the views of those around them, with Draco learning to be more open - minded from Luna and Luna learning some self - defense and strategic thinking from Draco.
One possible plot could be that Draco and Luna get married in secret to avoid the chaos that would ensue in the wizarding world due to their different backgrounds. They then start a new life away from the prying eyes, perhaps in a small cottage near a magical forest. Luna uses her unique magical knowledge to help Draco understand and embrace a different side of magic, while Draco's Slytherin cunning helps them protect their new home from any threats.
Perhaps there is a prophecy that involves both Luna and Draco as siblings. They are initially unaware of it, but as events unfold, they start to piece it together. They have to protect each other from dark forces that want to use them for their own gain. Along the way, they also explore their family history and find out about their parents' past, which helps them understand their own identities better.
One idea could be that Draco and Luna are paired up for a magical project at Hogwarts. Draco is initially dismissive of Luna's eccentric ways, but as they work together, he starts to see the beauty in her unique perspective. Another plot could involve them getting lost in the Forbidden Forest together and having to rely on each other's skills to get out. Maybe Luna's knowledge of magical creatures and Draco's Slytherin cunning combine to make an exciting adventure.
One possible unique plot could be that Draco and Luna discover they are demigods during a school event at Hogwarts. They are then tasked with protecting a magical artifact that is being hunted by dark forces. Along the way, they learn about their divine parents and the powers they inherit, and have to combine their Slytherin and Ravenclaw traits to outwit their enemies.
Well, a plot twist might be that their demigod powers are not what they seem. Draco might think his power is related to his family's dark arts background, but it turns out to be something completely different like the power to heal. Neville could be thought of as having a rather simple plant - related power, but it actually is the key to unlocking an ancient demigod magic. Luna, on the other hand, might be thought of as a bit of an oddball with her powers, but she actually has the power to see the future, which is crucial for their quests.
Perhaps a plot twist could involve a mystery related to the arranged marriage itself. It could be that there was a hidden prophecy or an ancient magical pact that led to their arranged union. As Draco and Luna try to figure out the true reason behind their marriage, they uncover secrets about their families and the wizarding world that no one else knew. This discovery could either strengthen their bond as they face these revelations together or put a strain on their relationship as they struggle to come to terms with the new - found knowledge.
Maybe the plot could center around Draco's relationship with the father of the child (assuming there is one in the fanfiction). If it's someone unexpected, like a Muggle or a Gryffindor, there would be a lot of conflict and drama. They would have to figure out how to co - parent in a world that might not be accepting of their situation. And Draco would have to navigate his feelings for this person while also dealing with the physical and emotional aspects of pregnancy.
Well, a plot twist could be that Luna discovers Draco has been involved in some sort of dangerous dark magic deal in the past that he hasn't fully come clean about. This could create a huge rift between them as Luna is a very pure - hearted person. Or perhaps there's a miscommunication spell that makes them believe things about each other that aren't true, like Luna thinking Draco is still a Death Eater at heart when he's actually changed. It would take a lot of effort to clear up this misunderstanding.
In some fanfictions, there could be a time - travel plot where Draco and Hermione from different timelines end up together and Hermione gets pregnant. This would involve dealing with the consequences of changing the timeline as well as their relationship dynamics.