Maybe there's a plotline where Naruto is arranged to marry someone from the Rookie 9 for political reasons in the village. At first, they might be reluctant, but as they get to know each other better, they truly fall in love and build a strong marriage. This could involve them working together to improve the village's relations with other villages through their union.
A possible plotline could be that Naruto is chosen by Kami for some greater purpose related to the balance of the world. As a result, they get married. Their union then brings about a new era of peace and prosperity as Naruto uses Kami's power to end all wars. Another plotline might be that Kami falls in love with Naruto's pure heart and determination. She decides to marry him, but they first have to convince the shinobi world that their union is for the good of all.
Perhaps in the fanfiction, Naruto saves Temari from a great danger. This heroic act makes Temari see Naruto in a new light. They begin to spend more time together, training or just talking. As time passes, their friendship turns into love, and they decide to marry, uniting the Leaf and Sand villages in a new way.
Well, perhaps there could be a plotline where Ranma is in a life - or - death situation and Happosai saves him. In gratitude, Ranma agrees to marry him, but then has second thoughts later. Or it could be that a mischievous character plays a trick on them and they end up married, and the rest of the story is about them trying to figure out how to undo it or make the best of it.
One possible plotline could be that in a post - war world, Narcissa and Harry find themselves drawn to each other through mutual understanding. Maybe Harry sees a different side of Narcissa that was hidden during the war, and they start to build a relationship from there that leads to marriage.
In some 'Harry Marries Lucius' fanfictions, it might start with a completely different wizarding world setting. For example, a world where the traditional enmities between the Gryffindors and the Slytherins are not as strong. Harry and Lucius could meet under different circumstances, like at a diplomatic event. Their relationship could then be a slow - burn one, with them having to navigate through cultural differences, power struggles within the wizarding world, and their own personal demons. This could all lead to their marriage and the subsequent development of their relationship.
Perhaps in some 'harry marries snape fanfiction', there could be a magical accident that binds their fates together. At first, they resist the connection, but as they get to know each other better, they find common ground and fall in love, leading to marriage. This could involve a lot of emotional turmoil and self - discovery for both characters.
One possible plotline could be Percy going through some sort of extraordinary adventure that changes Artemis's view of him. Maybe he saves her in a way that no one else could, and this new - found respect and connection gradually turns into love, leading to their marriage.
One possible plotline could be that in an alternate universe, Petunia and Sirius meet under different circumstances. Maybe Petunia has a more magical inclination than in the original story, and Sirius sees something in her that draws him to her. Their relationship then develops against the backdrop of the wizarding world's politics and the ongoing struggle against the Dark Arts.
One possible plotline could be that the sister of Lily, initially having some sort of enmity or misunderstanding with Severus, gradually discovers his true self and falls in love. Another could be a more arranged - marriage - type situation where for some reason, they are forced to marry and then develop feelings over time.
One possible plotline could be that fem Harry, having defeated Voldemort, somehow ends up in the Naruto universe. There, she meets Sasuke and they initially have a rocky relationship due to their different backgrounds and personalities. But over time, they discover they have more in common than they thought and fall in love, eventually getting married.