Perhaps the marriage contract is part of an ancient magical prophecy. At first, Harry and Tonks are both resistant to the idea. But as they start to explore the terms of the contract and what it means for the wizarding world, they realize that they might be the key to preventing some great evil. Along the way, they have to deal with the jealousy of others, like Tonks' former love interests or those who always had a crush on Harry. They have to navigate through these complicated emotions while also fulfilling their obligations according to the contract.
One idea could be the cultural and family clashes that come with such a contract. Maybe Harry's friends are shocked and have mixed reactions. Another could be how Harry and Tonks grow to understand and care for each other in the context of this contract. For example, they start off as strangers in this arranged - like situation but gradually find common interests.
One idea could be that the marriage contract was made by their families long ago without their knowledge. Harry initially resists but then realizes Cho has some qualities he admires. Another could be that the contract is a magical mistake and they have to work together to figure out how to break it while dealing with their feelings for each other.
One interesting idea could be the complex relationship dynamics that develop due to the marriage contract. For example, Harry might have to navigate new social expectations and deal with characters who have different motives regarding the contract. It could also lead to unexpected alliances or rivalries within the wizarding world.
Well, in some fanfictions with the 'Harry Hermione Tonks marriage contract', it's a plot device to bring together different story elements. Maybe it was set up by some magical law from the past. It can create a lot of drama. Hermione might be conflicted as she has her own feelings for Harry, and Tonks being involved adds another layer of complication. It can make for some really engaging reading.
One idea could be that Naruto unknowingly signs a marriage contract with multiple girls due to a prank by a mischievous character. Then he has to navigate through the awkwardness and growing relationships with each of them. For example, Sakura might be initially angry but then realizes her true feelings for Naruto through this situation. Another could be that the marriage contract is part of an ancient prophecy and Naruto has to fulfill it to save the village, which leads to him getting closer to Hinata, Ino and other female characters in different ways.
One interesting plotline could be how they deal with the challenges of their different personalities. Harry is often seen as serious and determined, while Tonks is more carefree and fun - loving. Their marriage might involve a lot of humorous misunderstandings at first as they learn to live together. For example, Tonks might play pranks on Harry that he initially doesn't take well but then learns to enjoy.
One possible plot development could be that the characters initially resist the contract. Harry might be in love with someone else, like Ginny. Hermione could be focused on her studies and not ready for such a commitment. Tonks might be angry about being forced into this situation. But as the story progresses, they start to see the benefits of working together because of the contract.
A possible plot is that Harry and Tonks time travel to a point where the creation of Horcruxes was just beginning. They could try to stop Voldemort from splitting his soul, which would change the whole course of the wizarding world's history. They would face many challenges, like not being discovered by Voldemort or his followers. Also, Tonks might use her skills to distract or mislead some of the Death Eaters while Harry looks for a way to destroy the Horcrux - making materials or the places where Voldemort hid them.
One plot idea could be Tonks helping Harry to master some of the more difficult Patronus spells. Since Tonks is a skilled witch, she could offer unique insights and training methods. Another idea is that they go on a secret mission together to find out more about Voldemort's hidden lairs. They might have to use Tonks' Metamorphmagus abilities to their advantage.
One interesting plot point could be how they initially react to the discovery of the marriage contract. Maybe Harry is shocked and Hermione is trying to figure out the legal and ethical implications.
One interesting plot point could be how Harry and Severus initially react to the marriage contract. Maybe Harry is shocked and resistant at first, while Severus is more resigned to it due to his sense of duty.