Well, they might run away to a secluded forest. There, they could build a small cabin and start a new life away from the chaos of their normal world. Maybe they discover some magical creatures in the forest that help them survive.
Maybe they are in a witness protection program and have to live together. Harry could be a former detective who has some information on a big crime syndicate and Susan could be an accountant who unknowingly has evidence against the same syndicate. While living together, they initially clash due to their different personalities. But as they face threats from the syndicate trying to find them, they learn to trust and rely on each other, and in the process, a strong friendship develops.
They could be two ordinary friends who have just decided that they need a change in their lives. Maybe they've grown up together in a small English town and now want to see what the world outside England has to offer.
In a 'Harry and Draco raised together' fanfiction, it could start with Voldemort being defeated much earlier, and the wizarding world is in a state of rebuilding. The Malfoy family, trying to redeem themselves, takes in Harry. As they grow up, Harry and Draco have a love - hate relationship at first. Draco is jealous of the attention Harry gets, but as they study magic together, they realize they can learn a lot from each other. They might discover new spells by combining the knowledge from different magical families, and this new - found bond could change the entire dynamic of Hogwarts.
Their relationship could start off rocky. For instance, if they have different cleanliness standards. Harry might be a neat freak and Susan more laid - back about cleaning. But as they communicate more, they start to respect each other's ways. Harry could learn to be more relaxed and Susan might make an effort to be tidier. This new - found understanding could lead to a deeper friendship where they share their secrets and fears.
At first, it might be rocky. Draco, used to his pure - blood superiority, would be a bit resentful of having to share his home and life with Harry. But as time passes, they'd start to see each other's good qualities. Harry's bravery would impress Draco, and Draco's cunning could earn Harry's respect. Eventually, they'd become close friends, always having each other's backs.
Their relationship might develop gradually. They could start as friends, sharing their post - war traumas and slowly realize they have deeper feelings for each other. Maybe they start spending more time together, going for walks in the Forbidden Forest or having tea in Hogsmeade.
There could be. Fanfiction communities are full of creative ideas. Nagato has his own set of abilities and a complex backstory. If he were to raise Harry, it would likely change the trajectory of Harry's life in many ways. Maybe Harry would learn different forms of magic or have a different view on good and evil. However, it's also possible that no one has written this particular fanfiction yet. It all depends on the creativity and interests of the fanfiction writing community.
Maybe in the fanfiction, Susan has some actions or traits that Harry doesn't like. For example, she could be really self - centered and always puts her own needs before others. This might make Harry, who perhaps values kindness and selflessness, to hate her.