In such fanfictions, the setting often plays an important role. It could be a dark, gothic world where vampires are part of the hidden society. Yugi might initially be unaware of Atem's true nature as a vampire. As the story progresses, he discovers it and has to come to terms with Atem's possessive behavior. This could lead to conflicts between them as Yugi tries to maintain his own identity while also being in a relationship with a possessive vampire.
One common trope is the 'forbidden love' aspect. Since Atem is a vampire, their relationship might be seen as taboo in the story's world. Another trope could be the 'damsel in distress' where Yugi is constantly in need of Atem's protection due to his vampire - related enemies. However, this can be subverted where Yugi is actually strong in his own right.
One common theme is protection. Atem's possessiveness often stems from his desire to protect Yugi. Another theme is the exploration of their deep emotional bond. It's not just about being possessive in a negative way, but more about how their relationship is unique. For example, in many fanfictions, Atem's possessiveness is shown as a sign of his love and loyalty towards Yugi.
One common theme could be the power struggle between Yugi and Atem as vampires. For example, they might compete for territory or influence within the vampire community. Another theme could be their relationship with mortals. They may struggle with the urge to feed on humans while also having some form of emotional connection to them. Also, themes of loyalty and betrayal often show up, like if one of them betrays the other for some personal gain or to protect a mortal they care about.
A really interesting fanfiction idea might be that there is a vampire hunter after Atem, and Yugi has to protect him. This would put Yugi in a tough situation as he has to use his wits and courage to keep Atem safe. They would have to work together, hiding Atem during the day and facing the hunter at night. It would be full of action and suspense.
Often, other vampires can be the main antagonists. Maybe there are some elder vampires who don't like Yugi and Atem's new - found power or their different way of being vampires. They could see them as a threat to the traditional vampire ways.
A common theme is friendship. Their bond is always explored in different ways, like how they rely on each other in tough situations. Another theme is self - discovery. As they interact, both Atem and Yugi often learn more about themselves.
You can try fanfiction websites like Archive of Our Own (AO3). It has a large collection of various fanfictions, including those about Atem and Yugi in a vampire setting.
One good story could be 'The Vampire's Bond' where Atem is a vampire and has a complex relationship with Yugi. It explores their connection in a world filled with mystery and danger.
One great possessive Atem x Yugi fanfiction is 'The Bond Beyond Time'. It beautifully portrays Atem's possessive yet loving nature towards Yugi. The story delves into their relationship, showing how Atem's protectiveness adds depth to their connection. It also has some really interesting plot twists that keep you hooked.
A third theme could be the connection between different worlds or states of being. Atem is from the spirit world and Yugi is in the physical world as a baby. The fanfiction could explore how their relationship bridges these two different existences, and how they interact despite the differences in their natures and the worlds they belong to.