Well, it could be that they are both on a secret mission. During this mission, they rely on each other and start to trust one another deeply. Draco's Slytherin cunning and Hermione's Gryffindor bravery complement each other. They find themselves falling in love during this intense time. And since it's all hush - hush, they decide to get married secretly. Maybe they have a small ceremony in a hidden part of the Forbidden Forest, with only a few magical creatures as witnesses.
One possible plotline could be that they discover they have more in common than they thought. Maybe they start working together on a project in the wizarding world, like researching a long - forgotten magic. As they spend time together, they realize their feelings for each other have changed from hatred to love. To avoid the chaos that would ensue from their families and friends' reactions, they decide to marry secretly. Another idea is that they are forced into a situation where they have to pretend to be married for some magical reason, like protecting a powerful spell or object. During this time, they start to really fall for each other and end up making it a real, secret marriage.
In a fanfiction, perhaps Draco has a change of heart after the war. He sees Hermione's intelligence and kindness in a new light. They start meeting in secret, sharing their thoughts and fears. The secrecy of their relationship builds a strong bond between them. They might get married secretly because they know that their relationship would be opposed by many in the wizarding community. Their marriage could be a way to show that they are willing to defy the norms and be together despite all odds.
Maybe they meet in a secret place during their school years, away from the prying eyes of their classmates. They start to exchange ideas and knowledge, which gradually turns into a deep emotional connection. This connection then leads to a secret marriage, and they have to deal with the consequences of hiding it from everyone they know.
One possible plotline could be that they initially keep their relationship and marriage a secret because of the ongoing feud between the Gryffindors and Slytherins. Another could be that they are forced into a secret marriage due to some magical bond or prophecy. And they have to navigate their new relationship while hiding it from their families and friends.
One plotline could be that they got married secretly to protect each other. Maybe Snape has some dangerous enemies and Hermione wants to help him, so they tie the knot in secret. Another could be that they fell in love while working on a very complex magical project together and decided to marry without anyone knowing because they feared the reaction of others.
One possible plotline could be that they got engaged during a dangerous adventure. Maybe they were trapped somewhere and made a pact to get engaged if they survived. And then they keep it a secret because they know their friends and families might not approve. For example, Ron might be really shocked and angry at first if he found out.
A possible plot twist is that Hermione is actually on a secret mission for the Order of the Phoenix when she marries Draco. She's using the marriage as a cover to get closer to some dark wizards Draco has connections with. As they spend more time together in their 'fake' marriage, they start to truly fall for each other, which complicates things for Hermione's mission.
Yes, there are some. You can try searching on fanfiction platforms like FanFiction.net or Archive of Our Own. Some authors might explore this unique relationship in their stories, often delving into how Hermione and Draco might overcome their initial differences and fall in love secretly. However, the quality can vary greatly, so it might take some time to find a really engaging one.
One possible plotline could be that Natsu has been secretly married to a character from his past. Maybe it was a rushed decision during a dangerous adventure, and they kept it a secret to protect each other. As the story unfolds, his friends start to suspect something is different about him. He becomes more cautious and less reckless, which is out of character for him.
One possible plotline could be that they got married to form an alliance between two powerful factions secretly. Another could be that they fell in love while on a secret mission together that no one else knew about. Maybe Itachi was on a mission to protect Naruto from afar and they developed feelings over time.
One possible plotline could be that they start to secretly help each other with their studies. For example, Draco might be struggling with a certain type of magic that Harry is good at, like Patronus Charms. In secret, Harry could give Draco some tips. Another could be that they team up to solve a mystery in Hogwarts that no one else is aware of. They might discover a hidden chamber or a secret spellbook together. They would have to keep their friendship a secret because of the rivalry between Gryffindor and Slytherin. Their friendship could also be tested when their respective houses are in competition, but they still find ways to support each other on the sly.
One plotline could be that they are magically bound to the apartment and can't leave until they resolve some deep - seated issues between them. Maybe there's a spell that requires them to get along and understand each other's perspectives.