A more detailed title could be 'In the World of HTTYD: The Encounter of Astrid and the Male Reader', which sets the story in the HTTYD universe and hints at the meeting of the two main characters.
One possible title could be 'Astrid and the Male Reader: A HTTYD Adventure'.
One idea could be to focus on how Astrid and Hiccup prepare for the baby. They might start building a new addition to their home on Berk. Hiccup could be super protective, while Astrid is determined to still be involved in dragon - related activities as much as she can until she can't anymore.
Explore their cultural differences within the HTTYD world. If the male reader is from a different tribe, show how Astrid and he learn from each other. They could share stories about their tribes' dragon - related traditions. This kind of plot can be really interesting and family - friendly.
One key element is the setting. Since it's HTTYD, you need to describe the Viking village, the dragon stables, and the surrounding islands. Another is the dragons themselves. Maybe the reader has a unique bond with a dragon that catches Astrid's attention. Also, their personalities should shine through. Astrid's leadership and the reader's own traits, like being kind - hearted or having a great sense of humor.
First, focus on building their relationship. Start with how they meet in the How to Train Your Dragon world. Maybe the reader is a new dragon rider and Astrid helps them train. Describe their conversations, like when they exchange tips on flying or taking care of dragons. You can also include their adventures together, facing challenges like a new dragon species or a threat to the village. This way, you can create a strong bond between them without any erotic elements.
Astrid's character could develop in many ways. She may become more empathetic towards the other mothers in Berk. Before, she was mainly focused on her warrior duties, but now she can relate to the women who have to take care of their families. She might also learn to rely on others more, especially Hiccup, as she goes through the physical and emotional changes of pregnancy.
She could be injured by a new type of dragon that no one has seen before. This would lead to a story where the riders have to study this dragon to find a way to cure Astrid. For example, they might discover that the dragon's venom has a unique antidote that can only be found in a certain part of the archipelago. Hiccup would be desperate to find it and in the process, learn more about the new dragon and its behavior.
One interesting plot idea could be Hiccup and Astrid going on a secret adventure to a new, uncharted island. They face new dragons and have to work together to survive. Another could be a story where they have to deal with a rift in their relationship due to a misunderstanding, like Astrid thinking Hiccup is spending too much time with a new dragon rider. A third idea is a time - travel plot where they go back in time and have to change something in Berk's history to save the future.
How about 'Natasha Romanoff x Male Reader: A Shared Adventure'? This title gives the idea that the two characters will go through something together, which is a common theme in fanfics. It also clearly shows the relationship between Natasha Romanoff and the male reader that the fanfic will focus on.
One idea could be that Astrid discovers she's pregnant during a time of relative peace in Berk. She initially tries to keep it a secret from Hiccup because she's not sure how he'll react. As the story progresses, she starts to show signs and has to face the reality of sharing the news. Meanwhile, the village is preparing for a new celebration, and Astrid is worried about how the pregnancy will affect her role in it.
Since 'lemon' fanfics are inappropriate, we can talk about common themes in regular Hiccup and Astrid fanfics. One common theme is their partnership in dragon - training and leading Berk. Another is their evolving romantic relationship, from initial attraction to deep love.