Fanfiction.net is also a great place. There are many talented writers who post their Miraculous Ladybug fanfictions there. To find the Luka and Marinette ones, you might have to use the search function and filter through the results a bit, but it's worth it as there are some really interesting stories.
Another option is Tumblr. There are often posts about great fanfictions, and you can also search for specific tags like 'Luka Marinette fanfiction'. Some Tumblr users even create their own mini - fanfictions in the form of short posts or threads, which can be really fun to read.
You can try websites like Archive of Our Own (AO3) or FanFiction.net. These platforms have a large collection of fanfictions on various topics, including Marinette and Luka from Miraculous Ladybug.
There's also 'The Luka - Marinette Connection'. In this fanfiction, the connection between Luka and Marinette is explored on a deeper level. It starts with Luka noticing Marinette's little quirks and how she tries to hide her feelings. As the story progresses, they start to open up to each other more. The author creates a really engaging story by adding in some mystery elements related to the Miraculous and how it might affect their relationship.
There are many interesting fanfictions about Marinette and Luka. Some might focus on their relationship development outside of the superhero chaos. For example, a fanfiction could explore how they go on a simple date, sharing their interests like Marinette's fashion design and Luka's music.
In Miraculous Ladybug fanfiction, Marinette and Luka often have a very sweet relationship. Luka is shown as a supportive character. He is someone who can sense Marinette's emotions quite well. In many fanfictions, he becomes a source of comfort for Marinette, especially when she is stressed about her superhero duties as Ladybug or her regular life problems like school and friendships.
One common theme is the exploration of their unrequited love. In the show, Marinette has a crush on Adrien, but in fanfictions with Luka, she may start to realize her feelings for him. Another theme is the power of music. Since Luka is associated with music, it often plays a role in bringing them closer, like Luka writing a song for Marinette.
One common theme is the exploration of unrequited love. Sometimes Marinette is still pining for Adrien while Luka is there loving her silently. Another theme is the power of music in their relationship, as Luka is a musician. It often serves as a bond between them.
One common plotline is about Luka helping Marinette deal with her feelings for Adrien. He becomes her confidant and through that process, they start to develop deeper feelings for each other.
Fanfiction.net is also a great place to search. There are a lot of Miraculous Ladybug fanfictions on this site. You might need to use the search bar and type in relevant keywords like 'Marinette Luka pregnant' to narrow down the results. However, the quality can vary, so you'll need to read the summaries and reviews to find the good ones.
One great place to find Miraculous Ladybug sub Marinette fanfiction is on fanfiction.net. It has a large collection with various themes and storylines centered around Marinette. Another option is Archive of Our Own (AO3), which also offers a diverse range of such fanfictions. Some are focused on Marinette's daily life as Ladybug, while others explore her relationships in different ways.
AO3 is the top place to start. There are thousands of 'luka and marinette fanfic' there with different themes and styles. Tumblr also has a lot of fanfic recs and sometimes even the full fanfics themselves. You can search for relevant tags like '#luka and marinette' or '#lukanette fanfic'. Some Discord servers dedicated to Miraculous Ladybug may also have channels where fans share their fanfics.