One idea could be a story where Kou and Yui go on a journey to discover Yui's past. Maybe they find an old diary that holds secrets about her family and how she ended up in the vampire world. This could lead to a series of adventures and a deeper bond between them.
First, you can start with a simple idea like their first meeting in a different setting. For example, instead of the usual mansion, they meet in a forest. Just describe the scene, how they look at each other, and what they are thinking. Then build on it from there.
In a fanfiction, Yui and Ayato could go on an adventure together. They might find themselves in a mysterious part of the mansion that no one has explored before. As they face various challenges there, they have to rely on each other. Ayato, who is usually so self - assured, might start to see Yui in a new light as her bravery and determination shine through.
Another theme is redemption. Shu, being a complex character, is often portrayed as someone who might find redemption through his relationship with Yui. It's about how their love could potentially change him for the better. For example, in some fanfictions, he starts to show more compassion towards Yui and others. And also, the theme of sacrifice is quite common. Yui might have to sacrifice her own comfort or safety to be with Shu, and vice versa, as they navigate the dangerous world they live in. This adds a layer of drama and intensity to the stories.
Common themes in Diabolik Lovers Ayato x Yui fanfiction include the struggle for control. Ayato wants to control Yui in many ways, but Yui may resist. Love and hate is also a big theme. Their relationship is so complex that it can swing between love and hate easily. And the theme of self - discovery for Yui. As she is in this strange relationship with Ayato, she discovers more about herself and her own strength.
Love and protection are common themes. Yuma often has a protective streak towards Yui. For example, he might shield her from other characters who mean harm. Another theme could be self - discovery. Yui might discover new aspects of herself through her relationship with Yuma.
One possible plot could be Yuma and Yui getting lost in the forest together. Yuma, being protective, tries to find a way out while also showing his softer side to Yui. He might share his past with her, like his experiences growing up, which deepens their connection.
Another way their interactions could be portrayed is through a series of misunderstandings. For instance, Ayato might misinterpret Yui's kindness towards another character as romantic interest. This would lead to some tension between them, but eventually, through communication, they would clear up the misunderstandings and their relationship would reach a new level.
One possible aspect of a Yui x Ayato lemon fanfiction could be the exploration of their complex relationship. In the Diabolik Lovers universe, Yui is often in a vulnerable position while Ayato has his own domineering nature. A fanfiction might delve into how their relationship evolves in a more romantic and steamy way, with the 'lemon' aspect adding an element of passion. It could show Yui gradually coming to terms with her feelings for Ayato despite the difficult circumstances they are in.
One possible aspect of this fanfiction could be the exploration of the complex relationship between Ayato and Yui. In many Diabolik Lovers stories, Ayato is often possessive and Yui is the more submissive figure. In a lemon fanfiction, this dynamic could be intensified in an intimate way. Maybe it shows how Ayato's vampiric nature affects their relationship during these more passionate moments. However, it's important to note that such fanfictions should still adhere to the general themes and boundaries set by the original Diabolik Lovers universe.