Well, a plot where Albus discovers a hidden talent for a particular type of magic that Harry is also interested in. So they start to practice and study it together, sharing their knowledge and experiences. Also, a story where Albus and Harry are invited to a special magical event in another country and they have to navigate the cultural differences and new magical challenges together. This would be a great way to show their relationship growing in a non - inappropriate context.
A good plot idea is that Snape, as a strict but fair teacher, takes Harry under his wing after realizing Harry has a special talent for a particular area of magic that Snape is an expert in. They then go on a journey of discovery, exploring ancient magic texts together and forming an unexpected bond. Also, perhaps Snape and Harry could be the only two who can stop a magical disaster from happening in Hogwarts by combining their unique skills and knowledge.
Another idea is to write a fanfic about the magical creatures of the 'Harry Potter' world from their perspective. Maybe a story about how a hippogriff views the wizarding students who come to visit it, or how a house - elf dreams of a different kind of life while still serving their wizard family.
One idea could be a story about Kushina teaching Naruto some of the Uzumaki clan's unique jutsu or traditions. It could show how Naruto learns about his heritage through his mother.
One idea could be a story where Eragon and Arya have to teach the young dragon riders about the importance of cooperation between different races. They could share their own experiences of working together to overcome challenges in the past.
Another idea is that the reader is a lost traveler who stumbles upon Claude in the forest. Claude initially has his own motives for helping the reader, but as they journey together to find the reader's way back home, they start to understand each other better. The reader might teach Claude about human emotions like kindness and friendship, and Claude might use his powers to protect the reader from various threats along the way.
One idea could be that the tentacles belong to a magical plant. The female Harry Potter character discovers this plant in a hidden part of Hogwarts' gardens. The tentacles of the plant are actually a key to unlocking a secret passage or a hidden magical power. So she has to figure out how to interact with the tentacles in a non - harmful way to gain access to this new discovery.
One idea could be Harry starting a magical gardening project at Hogwarts. He could be growing all sorts of magical plants and using them for potion - making and to beautify the school grounds. It would be a fun and positive story.
One idea could be a fanfic where Petunia discovers a hidden letter from Lily that reveals more about their family history and the magic in their bloodline. This could lead to her having a change of heart towards Harry and the wizarding world.
One idea could be a fanfic where Luna teaches Harry about some of the more unusual magical plants and their uses. It could be a story of discovery and learning. Another could be a fanfic set during the holidays where Luna invites Harry to her home and he experiences the unique lifestyle of the Lovegood family. And perhaps a fanfic where Luna and Harry work together to organize a school event that promotes acceptance of all kinds of magic and magical beings.
One idea could be a fanfic about Hermione starting a magical library where she shares her knowledge with young witches and wizards. It could focus on her teaching them important spells and lessons from her own experiences.