You can try some fanfiction websites like Archive of Our Own (AO3). There are often a lot of fan-created stories about different characters, including ones related to Light and Misa from Death Note. Just use the search function on the site and type in relevant keywords like 'Light Misa lemon' to see if there are any stories that match what you're looking for.
There's also 'L and Misa: A Different Perspective'. This fanfic delves deep into their characters. It explores how Misa's adoration for Light affects her relationship with L. It's really interesting to see how L tries to understand Misa's motives and how she might be a key in his investigation.
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.
The pairing of L and Misa is interesting because they are such different characters in the original 'Death Note' series. L is highly intelligent and logical, while Misa is more emotional and impulsive. In fanfics, seeing how these two contrasting personalities interact and potentially develop feelings for each other is fascinating.
I really liked 'The Unlikely Bond'. It's a fanfic that starts with L being intrigued by Misa in a way he didn't expect. The writing is quite engaging as it shows how their interactions gradually change from suspicion (as in the original series) to a sort of understanding and then something closer to affection. It's a slow - burn story that is really enjoyable to read.
The appeal of 'Death Note Light x Misa fanfiction' lies in their complex relationship. Light is this calculating, power - hungry character, while Misa is blindly in love. Fanfictions can explore different aspects of how they interact. For example, how Light uses Misa's love for his own gains or how Misa might try to change Light. It's also interesting because their relationship is a bit of a moral gray area, which gives writers a lot of room to play with different scenarios.