One common theme is the power dynamic. Given Light's intelligence and Misa's possession of a Death Note, there's often a play on who has more power in the relationship. Another theme is love and obsession. Misa is clearly obsessed with Light, and this is often explored in different ways in fanfiction.
One common theme could be the complex relationship between Light and Misa. Their power dynamics, with Light often being in a position of control and Misa being blindly in love, can be explored. Another theme might be the moral gray areas they both inhabit. Since they are both involved in rather dark deeds in the original story, fanfictions might play around with how this affects their relationship on a more personal and emotional level.
One common theme is the power struggle. Despite the kiss, there's always an underlying battle for control between Misa and Light. Another theme is the idea of sacrifice. Misa is often willing to sacrifice a great deal for Light, and the kiss can be seen as part of that. Also, the theme of secrecy. Their relationship, including the kiss, has to be kept hidden from many characters in the Death Note world.
One popular theme is the exploration of their complex relationship. In many fanfictions, they are depicted dealing with the moral implications of their actions within the Death Note world. Another theme could be their domestic life, like how they would live together and interact on a daily basis. Also, some fanfictions focus on their different personalities clashing and then finding common ground.
Another theme is the idea of redemption. Misa, with her complex past and actions, is sometimes depicted as seeking redemption in the eyes of L, who represents a sort of moral compass in these fanfics.
One common theme is friendship. Since Naruto is known for his ability to make friends and Misa is a unique character, their friendship is often explored. They might start off as strangers but end up being really close friends who support each other through tough times.
In many fanfictions about Light Yagami and Misa, their relationship is often complex. Light initially uses Misa for his own ends in the 'Death Note' story. He manipulates her feelings because of her Shinigami eyes which are useful for his plan to create a new world. Misa, on the other hand, is blindly in love with Light. In fanfiction, this dynamic can be explored in different ways. Some might show Misa slowly realizing she's being used, while others may focus on a more 'romanticized' version of their relationship where Light actually develops some real feelings for Misa.
One common theme is forbidden love. Given their complex relationship in the original story, their kiss can be seen as something that goes against the norm. Another theme could be the power struggle. Misa's love for L might be intertwined with her own desires and the power dynamics between them.
The writing style is crucial too. If the author can create a vivid atmosphere, it really enhances the reading experience. Descriptions of their emotions, the setting, and their physical interactions all need to be well - written. A good fanfiction in this genre doesn't just rely on the shock value of the 'lemon' content but uses it as part of a larger, more engaging narrative about these two complex characters from Death Note.
Another theme is the exploration of their personalities. Misa's bubbly and somewhat naïve nature contrasts with L's cold and calculating demeanor. Fanfictions often play with how these two personalities clash and sometimes, surprisingly, complement each other. For example, in some fanfics, Misa's unpredictability helps L in his investigations in unexpected ways.
Some fanfictions have a plot twist where Misa loses her Shinigami eyes in a way that wasn't in the original. This could make her more vulnerable, and Light has to decide whether to continue using her or actually start to care for her in a more genuine way. It also adds a new layer of danger as she no longer has that advantage, and their enemies may target her more easily.