One possible reason could be their different values. Harry is often associated with justice and kindness, while Draco has a more complex moral standing in the original story. If in fanfiction, Draco might continue to be involved in some dark or unethical activities that Harry can't tolerate, leading to the break - up.
Maybe it's due to misunderstandings. In the wizarding world, there are often secrets and rumors. If a false rumor spreads about Draco being involved in something really bad, and Harry believes it without proper communication, it could cause a break - up. Fanfiction often plays with such miscommunication tropes.
It could also be because of external pressures. For example, the expectations of their families or the wizarding society. If the society doesn't approve of their relationship (as it might be a rather unexpected pairing), the stress from all sides could become too much for them and result in a break - up.
One possible reason could be that their different post - war career paths put a strain on their relationship. Harry might be too consumed with his Auror duties, constantly in danger and away from home, while Ginny is focused on her Quidditch career. Another reason could be the pressure from the public eye. As two well - known figures in the wizarding world, the constant scrutiny and expectations from the public might be too much for them to handle together.
One possible reason could be that Ginny feels overshadowed by Harry's fame. In the wizarding world, Harry is a hero, and constantly being in his shadow might make Ginny feel like she's losing her own identity. Another reason could be differences in their future plans. Maybe Ginny wants to focus on her Quidditch career and travel around the world for matches, while Harry is more committed to his work at the Ministry, and they can't find a compromise.
One reason could be a misunderstanding. Maybe Mal overheard something Ben said that she misinterpreted. For example, if he was talking about some political decision for Auradon that she thought was about her personally.
Maybe in the fanfic, Harry discovers some differences between him and Ginny that he hadn't noticed before. For example, their future plans might not align. Ginny might want a more settled life at Hogwarts or in the wizarding community, while Harry feels an urge to explore the wider magical world and perhaps even try to improve relations with non - magical communities. These differences could lead to their break - up.
One possible reason could be the trauma they both endured during the war. Harry especially might have post - war issues that make it difficult for him to be in a relationship. He could be haunted by the deaths he witnessed and feel unworthy of love. Ginny, on the other hand, might have grown tired of waiting for Harry to fully recover. Another reason could be the different paths they want to take in life post - war. Harry might feel a strong sense of duty to help rebuild the wizarding world in a way that doesn't involve a relationship, while Ginny may want a more stable family - oriented life right away.
It could be because of the pressure from their respective families or the wizarding society. Their relationship was already controversial, and the addition of a pregnancy might be too much for Harry to handle. So, he decides to break up rather than face all the potential problems.
Jealousy can also be a factor. Maybe Harry becomes jealous of Hermione's close friendship with another character, or vice versa. This could create tension and ultimately result in a break - up. In some fanfictions, Hermione's intelligence and success might overshadow Harry at times, causing him to feel insecure in the relationship.
Sakura might grow tired of Sasuke's cold and distant behavior. In fanfiction, she could realize that she's been trying too hard to hold on to a relationship where she's not getting the love and attention she deserves. Maybe she meets someone else who shows her more care and respect, which makes her consider breaking up with Sasuke.
One reason could be Percy's constant danger - attracting monsters and putting Annabeth in harm's way too often. In fanfiction, authors might explore how this constant stress could lead to a breakdown in their relationship.
One possible reason could be their different approaches to life post - war. Aang is the Avatar and has a whole world to look after, while Katara has her own tribe and personal goals. Their busy schedules might pull them apart. For example, Aang might be constantly traveling to different nations for diplomatic and Avatar - related duties, leaving Katara feeling lonely. Also, they might have different ideas on how to handle future threats. Aang may prefer a more pacifist approach which Katara might not always agree with, especially if it endangers the people she loves.