One common theme could be the exploration of their complex relationship. Given their characters' backgrounds and the story they come from, fanfics might delve into how they navigate their feelings for each other in a more intimate context.
I'm sorry, but I don't have specific 'kaneki x touka lemon fanfic' to recommend directly. However, you can try searching on fanfic platforms like Archive of Our Own (AO3). There are likely many stories about their relationship there.
Good 'Touka x Kaneki fanfic' usually has well - developed characters. It should stay true to their personalities as we know them from the original story. For example, Touka's strong - willed nature and Kaneki's internal struggle should be depicted accurately.
There's also 'Love in the Shadows'. This fanfiction focuses on how Kaneki and Touka's relationship develops in secrecy within the ghoul society. It has some really interesting character interactions that build up to the more romantic and intense parts.
There might be a fanfic called 'Touka and Kaneki: Lemon Love'. In this story, it might explore how their love blossoms in a more intimate and passionate way, while still staying true to their original personalities from the source material. It could include tender moments and some steamy scenes that are tastefully written.
One possible plot could be that they face challenges in their relationship due to the pregnancy. For example, they might worry about how to protect their unborn child in a dangerous world they live in. Kaneki could be overprotective, while Touka tries to be strong and independent as always.
Reddit can also be a source for 'kaneki x touka fanfic'. There are some subreddits dedicated to Tokyo Ghoul fanfiction where you might come across some great 'kaneki x touka' stories. However, the content on Reddit might be a bit more scattered compared to dedicated fanfic platforms like fanfiction.net or Wattpad. But it's still worth exploring if you want to find some unique takes on their relationship.
The fanfic can also introduce new plot elements that are centered around their relationship. It could be a shared goal they have, or a mystery that only they can solve together. This kind of plot device can bring them closer and make the story more interesting. Also, the way the author describes their interactions, from the small glances to the deep conversations, can add a lot of charm to the fanfic.
Fanfiction.net is also a good place. They have a large collection of Tokyo Ghoul fanfictions. Look for the relevant tags or use the search function to specifically look for stories about Kaneki and Touka. You might need to dig a bit deeper to find the really good ones though.