Well, a plot could revolve around their children's friendships. Their kids might be in different houses at Hogwarts, like one in Slytherin and one in Gryffindor, causing some interesting family dynamics. They could struggle with the expectations of their respective houses while also trying to support each other. Or perhaps their children discover a hidden magical artifact that has a connection to both the Malfoy and Weasley families, and they have to figure out what to do with it together.
One idea could be that their children inherit a mix of their magical abilities. For example, having Draco's skill in potions combined with Ginny's talent for charm work. Another plot could involve their children facing a new dark threat at Hogwarts and having to use their unique family heritage to fight it. Maybe they have to deal with a new type of dark magic that is a combination of old pure - blood magic and some forgotten spells.
Here's a plot idea. Ginny becomes an Auror and is assigned to keep an eye on Draco who is still under some suspicion post - war. But as she observes him, she realizes he's not the same person he was. This leads to a series of interactions where they start to develop feelings. Another could be a story where Draco discovers a dark secret about Ginny's family that she doesn't know. He has to decide whether to use it against her or help her. And a third idea is a fanfic where they are both chosen for a special magical quest that only they can complete together, and during the quest, their relationship blossoms.
One idea could be that due to the marriage law, Draco and Ginny are forced together. At first, they are hostile towards each other because of their past differences. Draco's pure - blood pride clashes with Ginny's Weasley independence. But as time goes on, they start to see the good in each other. For example, Draco realizes Ginny's bravery and Ginny sees that Draco is not as bad as she thought.
There could be a fanfic where Ginny and Draco are paired for a dangerous mission. Maybe they have to infiltrate a dark wizard's lair. During the mission, they discover new sides of each other and form an unexpected bond. In this kind of plot, there would be a lot of action and adventure as well as character growth.
One idea could be that the Marriage Law forces them together, but at first they are hostile towards each other. Draco is still stuck in his pure - blood supremacist ways and Ginny is a fierce defender of the Weasley values. However, as they are forced to live together, they start to see the good in each other. For example, Ginny realizes that Draco is not as bad as she thought when she sees him being kind to a house - elf. And Draco discovers Ginny's strength and courage, which he starts to admire.
One interesting plot twist could be that Ginny and Draco's pregnancy is a result of a magical accident. Maybe a spell gone wrong during a battle or an experiment that binds their magical essences together. Another could be that they keep the pregnancy a secret from everyone at first, and as they struggle to come to terms with it, they start to develop unexpected feelings for each other. For example, Draco, who has always been a bit of a snob, realizes Ginny's true strength and kindness through this situation. And Ginny sees a more vulnerable side of Draco that she didn't expect.
One plot idea could be that Ginny is under the influence of a dark spell which makes her act out against Draco and Harry. This spell could be part of a larger plot by a dark wizard to create chaos in the wizarding world. Another idea is that Ginny has a misunderstanding about Draco and Harry's friendship and wrongly believes they are up to something bad, so she starts bashing them. Maybe she overhears a partial conversation and jumps to the wrong conclusion.
One interesting plot twist could be that Draco and Ginny initially resist the arranged marriage but then find common ground in their shared love for a particular magical art, like potions. They start working together secretly on new potion recipes and gradually fall in love. Another twist could be that there is a mystery surrounding the arranged marriage, like it was actually set up by an enemy to cause chaos in the wizarding world. As they dig deeper, they uncover a conspiracy and have to work together to stop it. And a third plot twist might be that Ginny discovers she has a long - lost relative who is related to Draco's family, which changes their perspective on the arranged marriage completely.
A great plot twist could be that in the time travel, they end up in an alternate version of Hogwarts where the roles are reversed. Ginny is in Slytherin and Draco is in Gryffindor. This makes them see each other in a completely different light. They have to deal with the prejudices of their new houses while also trying to find a way back to their own time and original selves.
A possible plot is that Draco is on probation and has to attend a special magical rehabilitation program at Hogwarts. There, he meets a group of students who are also in trouble for various reasons. Together, they form an unlikely bond and try to find a way to clear their names. Draco could also discover a hidden magic within himself during this probation period that could change his fate.
One idea could be exploring Draco's inner turmoil during his time at Hogwarts. Maybe show his struggle between his family's expectations and his own growing doubts about the Dark Lord. Another could be a time - travel plot where Draco goes back in time to change certain events. And a third idea could be a love story where Draco falls for an unexpected character, like a Muggle - born witch.