Perhaps in this fanfiction, it's a result of a dark wizard's plot against them. The pregnancy in their fifth year becomes a huge obstacle for them to face. They have to balance the challenges of being young and pregnant with the ongoing threats at Hogwarts. They might start to rely more on each other and discover new depths to their relationship as they prepare for the arrival of the baby. They also need to find a way to tell their families and friends, especially considering they are still students.
One possible plot could be that they accidentally get exposed to a magical spell or potion that causes the unexpected pregnancy. This then throws their fifth - year studies and their relationships with friends like Ron into chaos as they try to figure out how to deal with it while keeping it a secret from most of Hogwarts.
Voldemort or his Death Eaters could be antagonists. They might see the pregnancy as a way to manipulate or harm Harry and Hermione. For example, they could try to use the unborn child as a hostage or a weapon against them.
One possible plot could be that while they are on the run and hiding in the tent, they find unexpected love and a sense of family. Maybe they are forced to rely on each other more than ever, and this closeness leads to a romantic relationship and then the pregnancy. It could be about how they deal with this new situation in the midst of danger and their quest to defeat the Dark forces.
Well, self - discovery is a big theme. Harry is trying to figure out his place in the prophecy and Hermione is constantly learning more about herself and her capabilities. The theme of loyalty also pops up often, as they remain loyal to each other and to their friends in the face of danger. And the theme of facing the unknown, which is very much related to the increasing danger from Voldemort and his followers.
Perhaps it's a result of some dark magic interference. The story could focus on how Harry and Hermione struggle to find a way to reverse it at first. But as time goes on, they start to form an unexpected bond with the unborn child in a magical way. They might face discrimination or suspicion from some in the Hogwarts community who fear the unknown nature of this magical pregnancy, and they have to prove that they can handle it and that it's not a threat to the school.
One possible plot could be the challenges they face. Maybe Hermione is initially scared and conflicted about the pregnancy as Fenrir is a complex and somewhat dangerous character. Society might not accept their union, so they have to deal with secrecy and the judgment of others.
Well, it could involve a spell gone wrong during some magical experiment. Maybe a misfired charm that had unforeseen consequences on Hermione's body, leading to the pregnancy. The story might then focus on how she copes with this unexpected situation, both physically and emotionally.
One idea could be that Harry and Hermione discover a hidden chamber in Hogwarts that has been forgotten for centuries. In this chamber, they find a powerful magical artifact that is somehow related to Voldemort's past. As they try to figure out what to do with it, they face challenges from both the Ministry of Magic, who want to confiscate it for their own purposes, and some Death Eaters who also sense its power. Along the way, their friendship deepens as they rely on each other's skills and knowledge.
The plot could involve a magical mishap. For example, a spell goes wrong during a third - year Defense Against the Dark Arts class. This spell somehow makes Harry and Hermione's hidden feelings for each other surface. As a result, they share a kiss, which then leaves them both confused and trying to figure out what this new development means for their friendship.
A possible plot could be that Lucius, through his connections in the Ministry, manages to frame Harry for a serious crime. Harry then has to prove his innocence while also uncovering Lucius's true motives and his ties to the Dark Lord. It could involve a lot of sneaking around in the Ministry corridors and using magic to outwit Lucius's plans.
One possible plot could be that they sing to cheer up their friends at Hogwarts during a difficult time, like after a battle or when everyone is feeling down because of exams. Their singing could have some magical effect that lifts the spirits of those around them.