Maybe Astrid is hurt while on a mission to explore a new area. Hiccup, being the caring friend he is, sets aside his own tasks to stay by her side. He could search for a rare herb to heal her wounds. As he does this, their relationship deepens as Astrid realizes how much Hiccup truly cares for her.
Hiccup would probably be very worried. He'd rush to her side immediately. He might start to check her injuries right away and call for help if needed.
One possible fanfiction could be about how Hiccup and Astrid deal with the pregnancy. Hiccup might be overprotective, constantly worried about Astrid and the baby. Meanwhile, Astrid could be trying to keep up with her normal Viking duties while also preparing for motherhood. And the lemon element could be a symbol in the story, perhaps it's something Astrid craves during her pregnancy, leading to some humorous or heartwarming scenes between her and Hiccup as he tries to find the perfect lemon for her.
One possible plotline could be a role - reversal adventure. Since Hiccup is female in this scenario, she might face different challenges in dragon - training compared to the male Hiccup in the original. And Astrid, as a male, could have a different dynamic in their relationship, like being more protective or having different communication styles.
In the fanfiction, perhaps there's a moment when Hiccup gets injured while protecting the village. Astrid stays by his side day and night, taking care of him. She reads to him, makes him his favorite food, and in those quiet days, they realize how much they mean to each other. Their love deepens as they share these tender moments.
One interesting plotline could be that as they turn into dragons, they have to quickly learn how to fly and hunt like real dragons. They might face challenges from other dragons who see them as outsiders in their new dragon forms.
The theme of sacrifice can also be present. Maybe Astrid gets hurt while saving Hiccup, or Hiccup has to put himself in danger to rescue Astrid when she's in a hurt state. This can add a lot of drama and intensity to the fanfic.
A possible storyline is that Astrid and Hiccup face some challenges during the pregnancy. Maybe there are some old enemies who try to take advantage of Astrid's vulnerable state. But they overcome it with the help of their friends and the dragons. Also, they could discover some new dragon abilities related to pregnancy, like a special type of dragon that can help ease Astrid's discomfort during the pregnancy.
Well, the story could start with Astrid realizing she's pregnant. Hiccup is initially shocked but then overjoyed. The lemon could be a gift from a far - off land that Astrid receives early in her pregnancy. As the pregnancy progresses, Astrid might have to deal with morning sickness and mood swings. Hiccup tries his best to keep her happy, using the lemon in different ways, like making lemonade or using its scent to soothe her. There could also be some conflict in the village about the new addition to their family, but Hiccup and Astrid stand strong against it.
Perhaps in the fanfiction, Astrid's breastfeeding is a symbol of hope. The baby could be the key to bringing peace to a war - torn land. As she breastfeeds, it represents the nurturing of a new future. Or it could be that Astrid is from a different species, and the way she breastfeeds her baby is different from what is normal in that world, leading to some interesting cultural or biological exploration in the story.
Another plot could be that Hiccup and Astrid are both on the school's sports team. They are always competing with each other for the top spot. However, during an important competition, one of them gets injured. The other one shows great care and concern, which makes them see each other in a new light and leads to the development of their romantic relationship.