In a more dramatic fanfiction, Zeno and Shin - ah could be captured by an enemy force. The enemy wants to use their powers for their own evil purposes. Zeno and Shin - ah have to work together to escape, using their unique skills and the bond between them. They might also discover a hidden strength within themselves during this ordeal that they didn't know they had.
A fanfiction could be set in a parallel universe where Zeno and Shin - ah are the main characters instead of Yona. They could be on a mission to find a cure for Shin - ah's dragon powers that are slowly consuming him. Zeno, with his immortality, would stop at nothing to save his friend.
In a fanfiction, Zeno and Shin - ah could have a spiritual journey. Since Zeno has his unique immortality and Shin - ah has his dragon powers, they might enter a dream - like realm where they meet the spirits of the past dragons. There, they learn about the true origin of their powers and the history of the dragons that has been long forgotten. This knowledge could then be used to help Yona in her quest to reclaim her kingdom.
One common theme could be the exploration of their relationship. Since they are from a particular story, fanfiction might delve deeper into their emotional connection, perhaps how they support each other in different situations.
I'm not sure specifically about 'yona x shin ah lemon fanfiction' as it might be a rather niche area. You could try searching on popular fanfiction platforms like Archive of Our Own. They have a wide range of fanfictions and you might be able to find some related to Yona and Shin - Ah there.
The plot is also crucial. It could be an adventure set in the 'Akatsuki no Yona' world, where the reader and Shin Ah go on a quest together. Or it could be a more emotional story about Shin Ah opening up to the reader. Good grammar and spelling are a must as well. If the writing is full of errors, it can be really distracting. And the story should stay true to the overall tone and lore of the 'Akatsuki no Yona' series.
You could also join 'Akatsuki no Yona' fan communities on platforms like Reddit or Discord. Members of these communities often share their favorite fanfictions or even write and post their own. They might be able to point you in the direction of some great Shin Ah x Reader fanfictions. You can post a request in the community asking for recommendations too.
An OC with a special power related to nature could join Yona's journey. For example, the OC can communicate with animals and help the group in various situations like finding hidden paths or warning about approaching danger. This would add an interesting dynamic to the group as they face different challenges. The OC could also have a backstory about how they discovered their power and why they decided to use it to help others.
Well, you could write a fanfiction where the reader is a spirit - like being that only Yona can see. This being gives Yona advice and support in her toughest times. Or perhaps the reader is a lost warrior who has forgotten their past, and Yona's group helps them regain their memories while they, in turn, help the group with their combat skills.
A third plot idea could be to focus on the bond between the dragons and Yona from the dragons' perspective. What do they really think of her? Do they have any doubts about following her at times? This could create some internal conflict within the group. You could also explore how their bond might change or grow stronger over time, especially in the face of new challenges that test their loyalty to each other.
Maybe a male OC who is a healer. He joins Yona's group and uses his unique healing abilities to help the team in various situations. He also has a crush on one of the female characters in the group, which adds some romantic sub - plot.
One common theme is adventure. Since the original story likely has elements of adventure, fanfics in this pairing often continue that trend. Another theme could be love and romance, exploring the relationship between Yona and Zeno in different ways, like how they first fall in love or how they overcome obstacles in their relationship.