A plotline could be that the headmaster decides to start a new club in Hogwarts focused on inter - house unity. Hermione and Harry are chosen to be the leaders of this club. They have to come up with ideas to get students from different houses to participate. They face resistance from some students who are used to the old rivalries. But through their perseverance and creative thinking, they start to break down the barriers between houses. This story would highlight their leadership skills and their ability to bring positive change in the school environment.
A possible plotline could involve Hermione and Scabior having to deal with the magical and medical aspects of her pregnancy in a world where wizard - muggle relations (if Scabior is more on the wizarding side of things) are complex. Maybe there are issues with the pregnancy because of some dark magic that was cast on Hermione in the past. They would then have to search for a cure or a way to ensure the baby's health. Another aspect could be that they are on the run from some authority in the wizarding world who doesn't approve of their relationship, all while Hermione is pregnant, and they are trying to find a safe haven for their new family.
One plotline could be that the female centaur is in danger, and Harry Potter comes to her rescue. Maybe she has some information about a dark wizard's plan, and the bad guys are after her. Harry uses his wizarding skills to protect her, and in the process, they form a strong friendship. Another could be that the centaur is an outcast among her own kind, and Harry, being an outsider in some ways himself in the wizarding world, helps her find her place.
One possible plotline could be that the female Fawkes becomes Harry's special guide. She shows him hidden parts of Hogwarts or teaches him unique magical skills that Dumbledore didn't know about. Another could be that she is in danger, and Harry has to protect her, leading to a story of loyalty and friendship. Or perhaps she has a special connection to Harry's family and reveals secrets about his past.
One popular 'Harry is headmaster' fanfiction could be 'Harry Potter: The Headmaster's Era'. In this, Harry might bring new teaching methods and a fresh perspective to Hogwarts. Another could be 'Harry's Headmastership: A New Dawn' which perhaps focuses on his relationships with the students and staff as he takes on the role. There could also be a fanfiction that delves into how Harry overcomes the challenges of being headmaster while still dealing with his own past traumas.
One common theme is the power struggle. Dolores tries to exert her authority over Harry and the students at Hogwarts, and fanfictions often explore how Harry resists this. Another theme could be redemption. In some stories, Dolores might have a change of heart and start to see the error of her ways, and Harry could play a part in that transformation.
One plotline could be that this non - Hogwarts headmaster comes to Hogwarts on an exchange program. They bring their own unique magical curriculum and start to change the way students think about magic. There could be conflict with the traditional Hogwarts professors who are resistant to change.
One common plotline is them trying to change the Slytherin house's negative image. They bring their Gryffindor values like bravery and loyalty into Slytherin and try to reform it from within. Another is their relationship with the other Slytherins. They might have to deal with the pure - blood supremacist ideas that some Slytherins hold. Some fanfictions also explore how they adapt to the Slytherin common room and its more secretive atmosphere.
Well, perhaps a plotline where Harry has to deal with a new dark threat that is targeting Hogwarts specifically. As headmaster, he would use his knowledge of the Dark Arts and his friends' expertise to protect the school. He could also start new traditions at Hogwarts to boost the morale of students and staff alike.
In a more comical plotline, Hermione and Harry are on a quest, and Hermione's bra gets caught on a branch or something as they are running through the forest. Harry has to help her get free without making it awkward. It could also be that Hermione's bra has some sort of protection charm that Harry discovers by accident, and they have to figure out how to use it to their advantage during a dangerous situation at Hogwarts.
One possible plotline could be that Harry says something unkind to Hermione during a heated argument about a school project. This makes Hermione feel betrayed and sad. But later, Harry realizes his mistake and tries to make it up to her.