Well, a plot could involve Draco as a girl being in a love triangle. Maybe she has feelings for Harry, but at the same time, there's a Slytherin boy who has been in love with her for years. This could lead to a lot of drama and conflict within the Slytherin house and also between houses. Also, her family might react differently to her as a girl, perhaps her father has different plans for her than he would for a son, and she has to deal with that.
One idea could be a story where Scorpius discovers a long - hidden family secret that Draco has been trying to protect him from. It could involve some dark magic from their family's past.
A really interesting plot could be that Draco's transformation into a girl is part of a bigger magical mystery. She starts to notice strange things happening around Hogwarts that seem related to her change. As she tries to figure out what's going on, she teams up with unlikely allies from different houses. Along the way, she also has to deal with the prejudice and confusion from some of the wizarding community who don't understand or accept her new identity.
A great plot could involve Draco being forced to team up with a group of Ravenclaws for a special project at Hogwarts. At first, he's reluctant, but as he gets to know them, he begins to appreciate their different way of thinking. Maybe they're all trying to solve a mystery that has been plaguing the school, and Draco's Slytherin cunning combined with the Ravenclaws' intelligence makes for an exciting adventure.
One plot idea could be that Draco Malfoy accidentally stumbles into the Muggle world and meets a Muggle who is a huge fan of the wizarding world through books. The Muggle helps Draco see the beauty in the Muggle way of life, and Draco in turn shows the Muggle some magic in a very secretive way. They form an unlikely friendship that challenges Draco's pure - blood beliefs.
A possible plot for Draco Malfoy childhood fanfiction is his secret love for something that goes against the Malfoy image, like a Muggle - like hobby. This could create internal conflict within him. Another idea is his experience during the first time he used a broomstick. It could be a story of his excitement and determination to be good at it, but also his fear of failure. And a third one could be about how he coped with the news of having to go to Hogwarts, whether he was eager or reluctant.
A possible fanfiction plot could be that Draco, now a girl, discovers new magical abilities that were suppressed in his male form. These powers could be related to a more intuitive connection with magic, something that is often associated with femininity in the wizarding world. This newfound power could put her in a position where she has to choose between using it for the benefit of Slytherin or for the greater good of Hogwarts, creating a moral dilemma for her character.
A plot could involve Astoria being a secret healer who treats Draco after he gets injured in a dark magic - related incident. Draco is initially suspicious of her motives, but over time, he realizes she's truly there to help him and their relationship blossoms. This could explore themes of trust and redemption.
Another plot could involve Draco forming an unlikely alliance during his 6th year. For example, he teams up with a Muggle - born student to solve a mystery within the school walls. This would show his growth and changing perspectives. As he gets closer to this student, he starts to question the pure - blood ideology he was raised with.
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 Draco secretly trying to solve the mystery of the Chamber of Secrets on his own, not because he wants to help the Muggle - borns but to prove he's better than Harry at finding things out. Another could be a fanfiction where Draco has a change of heart due to an encounter in the Chamber and starts to question his family's beliefs about blood purity.