One common theme is the exploration of their intellectual rivalry turning into something more. Their constant mind games in the original series can be reimagined as a form of flirtation in yaoi fanfiction.
There might be a fanfiction where L discovers Light's identity as Kira much earlier, but instead of immediately trying to expose him, he decides to study Light's motives and actions more closely. This could involve some intense psychological battles between them as L tries to figure out what makes Light tick and Light tries to outwit L in a different way.
Well, in many 'Light x L Death Note Mate Fanfiction', a common theme is redemption. Light, who is a morally gray character in the original, often has a journey towards redemption in these fanfictions. Also, the theme of trust is very prevalent. Given their initial positions as enemies, building trust between Light and L is a major part of these stories. Additionally, there's the theme of facing external threats together, which forces them to rely on each other more and develop their relationship further.
Well, I've heard that some fanfictions explore their complex relationship in really unique ways. However, it can be a bit hard to find the really good ones. You could also check out fanfiction.net. Just keep in mind that the quality can vary a great deal.
The popularity might be due to the intense relationship between L and Light in the original 'Death Note'. Fans are intrigued by their intellectual battles and so they like to explore different scenarios in fanfiction, including the 'lemon' ones.
You can try Archive of Our Own (AO3). It has a large collection of fanfictions from various fandoms, including 'Death Note'. There are likely many well - written 'L x Light' fanfictions there with different themes and plotlines.
One great 'l x light' Death Note fanfiction is 'The Game of Shadows'. It delves deep into the complex relationship between L and Light. It shows their intellectual battles in a different light, adding new twists to the original plot.
Love in an unlikely situation is also a common theme. Given L's unusual personality and lifestyle, it's interesting to see how a relationship could develop between him and the reader - character. It's often a slow - building love, as L isn't the type to fall easily. Writers explore how love can grow in the midst of his high - pressure world of chasing Kira and solving complex crimes.
One common theme is the battle of wits. Since Death Note is all about mind games, the OC often gets involved in trying to outthink Kira alongside L. Another theme is the development of an unexpected relationship. L is such an aloof character, so seeing how an OC can break through his barriers is a popular plot point.
Yes, there are some interesting ones. You can start by looking on fanfiction.net. There are a variety of stories that explore the relationship between Sayu and L in different ways, from angsty dramas to more light - hearted takes on their interactions.