One plot that often shows up is their relationship with Hagrid during the third year. Maybe Hagrid gets into some trouble, and Harry and Hermione have to come to his rescue. They could also be involved in the mystery of the Shrieking Shack. Since Hermione is so curious, she'd be eager to solve the mystery, dragging Harry along with her. And in terms of their friendship, the fanfic might show how they support each other during the Quidditch matches, with Hermione being Harry's biggest cheerleader and Harry relying on Hermione's strategic advice.
A common plot could be their exploration of the Hogwarts grounds using the Marauder's Map. They might stumble upon some hidden passages or secrets that are related to the events of that year. Another one is dealing with the threat of Sirius Black. Hermione could be researching ways to protect Harry while Harry is more impulsive and wants to face the danger head - on. Also, there could be a sub - plot about their academic progress, like Hermione acing all her exams and trying to help Harry pass his, especially in subjects like Potions.
Friendship is a big one. Their bond grows stronger during the third year as they face more complex challenges together. Another theme is mystery. There are often new magical elements or secrets that they have to uncover. For example, a hidden chamber or a forgotten spell.
One possibility is that the fanfic delves into Hermione's over - studying for their third - year classes and how Harry tries to get her to relax a bit. They might have an adventure in Hogsmeade that goes wrong when they encounter some dark magic remnants from Sirius Black's escape. Harry could use his skills on the Quidditch pitch to boost his confidence, and Hermione would be there cheering him on while also secretly worrying about the lurking danger around them.
The themes usually include the exploration of love. As they grow from the 3rd to 7th year, their feelings might start to change. Another theme is the fight against the dark forces, which brings them closer. And there's also the theme of family, as they become like family to each other, especially with Harry not having a proper family, and Hermione's family being so different from the wizarding world.
One common theme is the deepening of their friendship. As they are in their sixth year, they've been through a lot together and the fanfics often explore how this shared history makes their bond stronger.
One interesting 'Harry and Hermione 3rd year fanfiction' story could be about their adventures in dealing with the time - turner mystery in a different way. Maybe they discover a new spell related to time while trying to solve the mystery of Sirius Black.
Well, I've also read 'Harry and Hermione: Third - Year Escapades'. In this one, they embark on an unexpected journey outside of Hogwarts due to a prophecy they discover. Their third - year knowledge and skills are put to the test as they encounter various magical creatures and obstacles along the way.
One common plot is the 'slow burn' where Harry gradually realizes his feelings for Hermione over time. It might start with him getting jealous when Hermione spends time with other guys. Another plot could be a 'what - if' scenario, like what if Harry had realized his feelings earlier in the series and how that would have changed the events of the books.
One possible plot could be that Hermione does something that Harry perceives as a great betrayal, like perhaps siding with the Ministry when Harry believes they are corrupt. This could lead to a deep - seated hatred from Harry.
Another plot could be Hermione seeking help or refuge. Maybe she confides in a Hogwarts teacher like Dumbledore or McGonagall about her home situation. They could then offer her support, such as extra study time in the library or a safe place to stay during holidays when she doesn't want to go home.
A notable one is 'The Hidden Feelings'. It focuses on the subtle changes in their relationship during the 3rd to 7th years. The author does a great job of portraying their unspoken emotions and how they gradually come to realize their feelings for each other.