There's this fanfiction called 'Draco and the Muggle Girl'. It's a love story where Draco falls in love with a muggle girl. The author does a great job of exploring how their relationship develops against the backdrop of the magical and non - magical worlds.
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.
To portray their relationship realistically, it should start with a lot of mistrust from Draco's side. He's been brought up to think Muggles are inferior. So, when he first meets the Muggle in the fanfiction, he might be disdainful. But the Muggle, being a fan of the wizarding world, shows genuine interest and kindness. This could gradually break down Draco's walls. Their relationship would be a slow - burn, with many bumps along the way as Draco struggles with his ingrained beliefs.
In a fanfiction where Draco Malfoy and a Muggle have a baby, there could be a lot of conflict. The wizarding world might not accept the baby easily due to its Muggle heritage. Draco could struggle with protecting his family from the prejudice of his own kind. He might have to make difficult choices between his loyalty to the wizarding world and his love for his Muggle - born family.
His Slytherin friends would likely be shocked and disapproving. They are brought up with the idea of pure - blood superiority. Loving a Muggle goes against everything they believe in. Some might even turn their backs on Draco.
There's also 'Muggle in Malfoy Manor'. In this fanfiction, the Muggle OC gets accidentally involved with the Malfoy family. The story does a great job of exploring Draco's character as he interacts with someone so different from his usual pure - blood society. It has a lot of tense moments as well as some sweet interactions between Draco and the OC.
You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. Just type 'Draco Malfoy muggle' in the search bar and you'll get a whole list of relevant stories.
The contrast. Draco is from a pure - blood wizarding family with strict beliefs, and a Muggle OC is from a completely different world. Their interactions can be full of tension, discovery, and unexpected chemistry.
The baby could be a target for dark wizards who oppose the mixing of wizard and Muggle blood. Draco would have to be constantly on guard to protect the baby. This could lead to some exciting action scenes in the fanfiction where Draco uses his skills and knowledge of the wizarding world to fend off attackers.
There could be a fanfiction where Scorpius and Draco go on a magical adventure together. Maybe they discover an ancient magic that was lost for centuries and have to keep it a secret from the wizarding world. This would explore their relationship as father - son and their courage in the face of danger.
One great fanfiction could be 'The Unlikely Alliance'. In this story, Harriet and Draco are forced to work together on a school project and gradually start to see each other in a new light. It has some really interesting character development.