Another plot might be that their kiss is a part of a deal. The ghoul world is in chaos, and in order to gain the support of Touka's group, Kaneki has to prove his loyalty. As a sign of his commitment, he kisses Touka in front of everyone. But what starts as a political move slowly turns into real feelings as they start to understand each other better through this act.
Well, one interesting plot could be that they kiss in a dream - like state first. Kaneki, perhaps after being severely injured, is in a coma. In his dreams, he and Touka share a passionate kiss. When he wakes up, he realizes his true feelings for her even more strongly, and later in the real world, they share a similar kiss. This creates a connection between the dream world and reality in the fanfiction.
One possible scenario in a fanfiction could be that after a long and arduous battle against the CCG, Kaneki and Touka find a moment of peace. They look into each other's eyes, realizing how much they've been through together. Then, slowly, Kaneki leans in and their lips meet. It's a tender and passionate kiss that symbolizes not only their love for each other but also their hope for a better future in the dark world of Tokyo Ghoul.
In some fanfictions, Kaneki and Touka team up with other ghouls to fight against a common enemy that threatens the existence of all ghouls. Their relationship is a key factor in bringing the different ghouls together and leading the fight.
One possible fanfiction could focus on Kaneki and Touka building a life together after the chaos in Tokyo. They might start a small coffee shop where they can interact with both ghouls and humans in a more peaceful way. This could be a symbol of their hope for a harmonious co - existence between the two species.
The popularity might be due to their complex relationship. They have a lot of chemistry and their story in the original series is full of twists and turns. Fanfictions allow readers to explore different aspects of their relationship that were not fully developed in the original.
Kaneki and Touka could be in a situation where they have to team up with some former enemies to save the ghoul community from a new threat. This would test their ability to forgive and their leadership skills within the community.
Common themes in fanfictions about their love include growth. Both Kaneki and Touka grow as individuals because of their relationship. They become more empathetic and stronger. Another theme is the exploration of the forbidden. Their love is a bit of a taboo as a ghoul - human relationship (even though Kaneki is half - ghoul). It adds an element of excitement and danger to their story. And unity is also a theme, as they unite against the forces that try to tear them apart and the discriminatory world around them.
A fanfiction might explore the idea of Kaneki and Touka's married life in a more comical way. Maybe they argue about who does the dishes, as ghouls don't really have normal eating habits. Or they have to deal with their friends constantly dropping by unannounced. Their relationship would still be full of love, but these little everyday situations would add a touch of humor to their married life.
In fanfiction, Kaneki and Touka's love is often portrayed as a deep and complex bond. They've both been through so much trauma in the Tokyo Ghoul world. Their love can be seen as a source of healing for each other. Kaneki, with his internal struggles, finds solace in Touka's strength and determination. Touka, on the other hand, is drawn to Kaneki's kindness beneath his tortured self. Fanfic writers explore how they support each other, grow together, and face the challenges of their ghoul - human coexistence world side by side.
Perhaps their baby is born with extraordinary powers. In the fanfiction, it could be a symbol of hope for the future. Touka and Kaneki would be extremely protective, teaching it about the importance of coexistence. The baby might grow up to be a key figure in creating a more harmonious world for ghouls and humans, using its powers to end the long - standing conflict.
Love and acceptance are very common themes. Given that Kaneki is a half - ghoul and Touka is a full ghoul, their relationship often explores how they accept each other's differences.