Well, perhaps in this fanfiction, Harry could be the first male to enter a female - only profession. Say, in a world where only women are healers, he wants to be one too. He has to break through the barriers of tradition and偏见 (prejudice). Also, he might discover that the magic in this all - female world has some different aspects compared to what he knew before, and he has to adapt to use it effectively.
One idea could be that Harry has to adapt to the different social dynamics in an all - female world. For example, he might find that the way conflicts are resolved is very different from what he's used to. Maybe instead of physical fights, there are more diplomatic discussions. Another plot could be Harry trying to find his place in this new world, like joining an all - female school or club where he has to prove himself worthy among the girls. He could also be on a quest to find a way back to his own world, but in the process, he learns valuable lessons about gender equality and the strength of women.
One idea could be that in this all - female Naruto world, the female ninjas have to deal with a new kind of threat that only targets women. They form an all - female alliance to combat it. Another could be exploring the different relationships between the female characters. For example, how Sakura and Ino's friendship might develop in a world without male counterparts, and they could be rivals in a different way, like competing for the top position in a female - only ninja academy.
Well, perhaps in this 'naruto all female world harem fanfiction', Naruto is on a mission in a strange dimension that turns out to be all female. The women there are from different clans in the Naruto universe. He has to form alliances with them to get back home. Some of the female characters might have unique powers that are enhanced in this all - female world, and Naruto has to figure out how to work with them.
One idea could be exploring what would happen if Harry Potter used his magic to create a parallel Hogwarts where students from different magical cultures around the world come together. This could lead to new friendships, rivalries, and the discovery of new spells and magical abilities unique to each culture.
A possible plot for this fanfiction could be traveling through the different dimensions of the Harry Potter universe. There might be a dimension where Voldemort won, and seeing the desolate and dark state of the wizarding world there. Another aspect could be traveling with a group of friends to explore the magical ley lines of the world. These ley lines could be the source of powerful magic and hold secrets waiting to be uncovered. And, a journey to the magical libraries around the world, like the restricted section of the Hogwarts library on a grand scale, seeking rare and dangerous books of magic.
One idea could be being reborn as a muggle - born wizard who has a unique ability to communicate with magical creatures in ways others can't. This could lead to all sorts of adventures in the Forbidden Forest and uncovering secrets about the creatures that help in the fight against Voldemort.
One idea could be that Harry discovers a new and ancient magic that is the key to defeating a previously unknown dark force. For example, he might find a hidden spell in a long - forgotten book in the Room of Requirement.
Maybe in this fanfiction, Harry discovers a new kind of magic that allows him to reshape the wizarding world's laws across the globe. He could make Hogwarts - style education available everywhere, even in the remotest Muggle villages. This would not only spread magic knowledge but also bring the two worlds closer together.
Another idea is a story where a spell goes wrong during a Defence Against the Dark Arts class. Instead of just a minor mishap, it creates a portal to an alternate dimension where Hogwarts has a completely different layout and the magic there works in strange ways. The students then have to find their way back while dealing with the strange new magical threats in that dimension.
One idea could be exploring the wizarding world in a different time period, like the Middle Ages. Wizards could have different magical practices and face different threats. Another could be a story where Harry's children discover a hidden part of Hogwarts that has been locked away for centuries, filled with ancient magic. Maybe also a fanfiction where the roles are reversed, and the Death Eaters are the ones in power, and a group of young witches and wizards rise up against them in a new and unique way.