I'm not entirely sure specifically as it's a fanfiction. But generally, 'mpreg' stands for male pregnancy in fanfiction worlds. It might involve a story where Harry from the Harry Potter series is in a situation related to male pregnancy in a plot created by the author named Grayback. However, without reading it, it's hard to give more details.
I'm not sure about its popularity. There are so many fanfictions out there that it's hard to gauge the popularity of just one. It might be popular among a niche group who are interested in the concept of mpreg and Harry Potter, but it may not be widely known to the general Harry Potter fanbase.
One great fanfiction could be 'The Unseen Bond'. It explores an unexpected connection between Harry and Grayback. It delves into how their fates cross in a world where the line between good and evil is more blurred than in the original series. The author creates a complex relationship, showing how Harry's presence affects Grayback's actions and vice versa.
Another way is by exploring their magical similarities. Maybe they discover that they have some unique magical abilities that are related in some way. This could create a sense of kinship, even if they are on opposite sides of the moral spectrum. They might start to understand each other better through these magical connections.
Well, it might be good because it could have an interesting take on the characters of Hermione and Fenrir. Maybe it explores their relationship in a unique way that we haven't seen before in the original works.
Sorry, I'm not really sure of any specific ones similar to it off the top of my head. But you could try searching on fanfiction platforms using tags related to Hermione, Fenrir, and the genre of the original story it's based on.
In this fanfiction, their relationship could transform in a significant way. At first, they may have been more like acquaintances or even rivals among werewolves. But with Harry in the picture, they would be forced to communicate better. Remus could influence Fenrir to be more civilized, while Fenrir could make Remus more assertive. They would share the joys and sorrows of raising Harry, which would create a bond between them that was stronger than just their werewolf connection.
In many such fanfictions, Hermione might start by trying to understand Fenrir's situation from a research perspective. She could be using her extensive knowledge of magic and werewolves to figure out a way to help him. For example, she might look into any spells or potions that could ease his lycanthropy symptoms.
It could be other Death Eaters. They might suspect that Fenrir is up to something with Hermione and try to stop him. For example, Bellatrix Lestrange could be a major antagonist. She's known for her cruelty and loyalty to Voldemort, and she might not trust Fenrir's actions regarding Hermione.
Well, in this kind of fanfiction, Fenrir might be protective of Harry perhaps because he sees something special in Harry. Maybe he has his own reasons that are different from the normal perception of their relationship in the original works. It could be that Fenrir has a change of heart or there are some hidden plot elements that make him want to safeguard Harry.