There might be some. However, it's important to note that when looking for such fanfiction, one should be careful to avoid inappropriate content. A good place to start would be well - known fanfiction websites where moderators often ensure the content adheres to certain standards. You can search for stories that explore their relationship in a positive and family - friendly way, like them working together to save their dragon friends or their respective riders.
I can't really point you to 'lemon' fanfiction as it usually involves adult - themed or inappropriate content. But in general, Toothless and Stormfly fanfictions that are popular often involve their epic battles side by side or their heartwarming interactions within the dragon - vikings community of Berk.
One common theme is friendship. Since they are both dragons from different species, their friendship is often explored, like how they learn to understand and communicate with each other.
In a fanfiction, Toothless and Stormfly might find themselves in a dangerous situation. Maybe they are trapped in a hidden cave by some hunters. While trying to escape, they have to rely on each other. Toothless uses his stealth to find a way out, and Stormfly uses her spiky tail to fend off any threats. Through this shared experience, they develop a deep bond. As they finally escape and soar into the sky, they realize they have fallen in love.
One common theme is friendship. Since they are both dragons in the How to Train Your Dragon series, many fanfictions will explore how they become friends and support each other. Another theme could be adventure. They might go on exciting adventures together, facing different challenges along the way.
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.
Astrid might initially be in shock. She could just stand there, frozen, unable to believe that Hiccup is really gone. Her eyes wide open and her body trembling as she tries to process what has just happened.
There could be a mean - spirited colleague named Mark. He might constantly make snide remarks about Astrid's work or appearance, which would add to her discomfort. Another character could be a nosy neighbor, Mrs. Thompson. She always pries into Astrid's personal life, asking inappropriate questions and making Astrid feel awkward. And then there could be a clumsy acquaintance, Jake, who always seems to get in Astrid's way and cause embarrassing situations for her.
A possible story could be about how Toothless and Stormfly's relationship evolves. Maybe they start off as just friends who are part of the same dragon group. One day, during a dangerous adventure, they have to rely on each other more than ever. This newfound closeness leads to a moment of understanding and perhaps a gentle kiss as a sign of their deepening bond.