Typically, a kaneki x rize fanfic often includes their initial encounter. Since their first meeting in the original story was so impactful, it's usually a key element. For example, some fanfics might change the setting of that encounter to create a different mood.
In some fanfictions, their love is often portrayed as a complex and somewhat tragic relationship. Given their nature as a ghoul and a half - ghoul in the Tokyo Ghoul story, there are often elements of danger and secrecy.
One popular 'kaneki x rize fanfic' is 'The Unseen Bond'. It delves into an alternate universe where Kaneki and Rize's relationship develops in a more positive way compared to the original story. It shows how they could have supported each other in different circumstances.
I think a 'brother to lover' fanfiction about Rize Kamishiro might explore complex emotions. It could delve into the initial bond of brotherhood and how it gradually transforms into romantic love. Maybe it would show their internal struggles as they deal with this shift in feelings, especially considering the social taboos often associated with such a relationship in many cultures.
A fanfic could focus on the backstory of the Kamishiro brothers. Explore their childhood, how they discovered their powers, and what led them to become who they are. Maybe there was a tragic event in their past that shaped their personalities and made them so close to each other.
One aspect that could make it appealing is the exploration of deep emotional connections. Moving from a brotherly bond to a romantic one involves a whole range of emotions like confusion, guilt, and ultimately, deep love. The 'OC' in the fanfiction can also introduce fresh perspectives and storylines that can enhance the overall allure of the narrative. It allows for creativity in how the relationship unfolds and how the characters interact with this new situation.
In some fanfiction, their kiss might be a very passionate and intense moment. It could be described with a lot of detail, like the way their lips meet and the emotions that flood through them at that instant.
You can try some popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of various fanfictions, and you might be able to find some great ones about Kaneki and Rize there.
The kiss between Kaneki and Rize in fanfiction could hold various meanings. It could be a foreshadowing of future events. For example, it might lead to Kaneki's transformation in a different way than in the original story. It could also be a moment of passion that shows a deeper, hidden attraction between them that the original plot didn't fully explore.
First, know the characters well. Study their personalities, motives, and relationships in the original work. This will help you write them in a way that is consistent. For example, if one brother is more impulsive, show that in your fanfic.