Well, perhaps in this fanfiction, the female is the only one who can hear a special sound from the Toothcup when she hiccups. This sound could be a call for help from an ancient spirit trapped within the Toothcup. She then embarks on a journey to free the spirit, facing various challenges along the way. The hiccup becomes a key element in her communication with the Toothcup and the spirit.
For the female character, you can develop her based on how she reacts to her hiccup. Is she embarrassed by it? Or does she see it as something unique? Her relationship with the Toothcup can also shape her. If she sees the Toothcup as a solution to her hiccup problem, she might be more determined. For the Toothcup, you can give it characteristics like being mischievous or wise, which will then influence how it interacts with the female character.
A really interesting plot could be a time - travel one. Maybe Female Hiccup travels to Jack Frost's past or vice versa, and they have to adjust to the different time periods while also falling in love. Or perhaps there's a plot where they are both tasked with protecting a special, magical artifact that has the power to change the balance of their worlds, and they have to overcome their differences to succeed.
One plot idea could be that Dagur and Female Hiccup are forced to team up to face a new threat in their land. They start off not trusting each other but as they go through various challenges together, they begin to respect and then develop feelings for one another. Another could be a story where Female Hiccup has to save Dagur from a dangerous situation and in the process, Dagur realizes how strong and amazing she is, leading to a friendship that could turn into something more.
One plot idea could be that Hiccup, as a female, has unique ways of bonding with the dragons. For example, she might use her more empathetic nature to understand their needs better than in the original story. Another could be that she faces different challenges in the Viking society which is often male - dominated. Maybe she has to prove herself even more to be accepted as a dragon rider.
I'm not entirely sure if there is a large quantity of Toothcup Lemon fanfiction specifically. It could be a relatively niche or new concept. Maybe if you search on some dedicated fanfiction websites, you might find a few pieces. These could range from short, sweet stories to more complex, multi - chaptered ones.
A possible plot is that there is a magical event that switches the minds of Stoick and Baby Hiccup. So Stoick has to figure out how to take care of himself as a baby while Hiccup, in Stoick's body, has to deal with the responsibilities of being the chief. It would be full of comical and heartwarming moments as they both learn about each other in a very different way.
Well, a plot could revolve around them starting a family. Hiccup and Heather could face difficulties in having children, like dealing with some sort of magical or environmental factor that is affecting their ability to conceive. Or perhaps they adopt a child from a troubled tribe and have to help the child adjust to their new life with them.
One idea could be Hiccup discovers a hidden tribe in a remote jungle. Another could be that he encounters a mythical creature in an uncharted ocean region. Maybe he also teams up with a group of international dragon riders to save a world - spanning dragon sanctuary.
One idea could be that Hiccup discovers a new type of half - dragon that has unique abilities, like the power to control time briefly. This could lead to adventures where he has to use this new discovery to save Berk from an ancient threat that is about to be unleashed. Another plot could involve the half - dragon being a hybrid of a very rare and powerful dragon species, and Hiccup has to protect it from dragon hunters who want to use its power for evil.
Well, perhaps there could be a fanfiction where Hiccup and Elsa are both summoned by a powerful wizard to help with a prophecy. They don't trust each other at first, but as they face the challenges set by the wizard, which include tasks that require both fire (from Hiccup's dragon) and ice (Elsa's power), they start to respect and care for each other.