One possible plot could be that they have to keep their relationship a secret from Ron, who might be jealous. So they meet in hidden corners of Hogwarts, like the Room of Requirement, to spend time together.
Maybe they start dating secretly because they fear how the wizarding world will react. They share their thoughts and feelings about magic and life in hushed conversations in the Forbidden Forest when they think no one is around. This adds an element of mystery and danger to their relationship.
The wizarding media or gossip - mongers could be antagonists. If word got out about their relationship, it could cause a stir. They would try to expose Harry and Hermione's secret, putting pressure on their relationship. So they have to constantly be on guard against these prying eyes.
One interesting plot could be them facing opposition from Ron at first. Since Ron has been their close friend, he might struggle with the idea of Harry and Hermione dating. But as time goes on, he realizes how happy they are together and comes to accept it.
One possible plot could be them trying to keep their relationship a secret from their friends. For example, they might have to come up with excuses for why they're always disappearing together. Another plot could involve Hinata's family finding out. Her father might initially be against it, but then come to see how much Naruto has changed and grown, and finally give his blessing.
One common theme is the secrecy aspect itself. Writers often explore how they keep their relationship hidden from their friends like Ron. Another theme could be the challenges they face due to the wizarding world's expectations. For example, there might be concerns about how it could affect their roles in the fight against Voldemort.
Some fanfictions might have a plotline where Draco and Hermione are secretly dating and they communicate through enchanted objects. Since they can't be seen together often, they use magic to send messages or small gifts to each other. This adds an element of mystery and secrecy to their relationship. Another idea could be that they meet in a hidden part of Hogwarts, like an old abandoned classroom or a secret passageway. Here, they can be themselves and share their feelings without the fear of being discovered. There could also be a plotline where they help each other overcome personal issues. For example, Draco helps Hermione deal with the pressure of being the best in her class, and Hermione helps Draco break free from his family's expectations.
One possible plotline could be the two of them trying to keep their relationship hidden from Ron, Ginny's brother. Since Ron is Harry's best friend, they might be worried about how he'd react. Another could be them sneaking around Hogwarts to have private moments together, like meeting in the Room of Requirement.
Another possible plot is that Harry's secret as a king is tied to a magical or supernatural element. For example, there could be a prophecy that only he can fulfill as a king. And his journey to discover and fulfill this prophecy involves him facing various challenges, making new friends and enemies, and ultimately rising to his true position as a king with great power and responsibility.
One possible plot could be that Harry, being secretly a girl, has to constantly hide her true identity while dealing with the challenges at Hogwarts. Maybe she's afraid of how her friends would react if they found out.
Another plot could be that Naruto is secretly dating someone who is a bit of an outcast in the village, like a person with a unique chakra ability that others don't understand. They bond over feeling different, and Naruto has to protect their relationship from those who might not approve.
In this type of fanfic, an exciting scenario could be when they go on a secret date to a place that's special to them, like the place where they first met. But they have to be super careful not to be seen. They might even have a code word or signal to let the other know if there's any danger of being discovered.