Well, it could be about Kaneki finding himself in a world full of magic, where he has to learn new powers to survive. Maybe he meets new characters who are either friends or foes.
Well, it could be that Gilgamesh is transported to a modern world. He might struggle with the new technology and social norms. For example, he could be baffled by smartphones and the concept of social media. Maybe he uses his ancient wisdom and strength to become a sort of protector in this new world, facing off against new threats that are a mix of modern evils and magical creatures that exist in this new world due to some strange rift between dimensions.
There could be a wise old wizard who becomes Kaneki's mentor in the new world, guiding him on how to use the magic there.
Well, it could be about Naruto finding himself in a strange new world where he has lost his friends and is mourning their absence. Maybe he's trying to find a way back to his own world while dealing with his grief.
In a 'doom slayer in another world fanfiction', perhaps the Doom Slayer is transported to a post - apocalyptic world different from his own. Here, he has to adapt his fighting style to new threats. He could discover new ways to upgrade his weapons using the resources of this strange world. Maybe he even has to face a new kind of demon that has evolved in this different environment.
Well, it could be about Sakura exploring a magical new world filled with strange creatures. Maybe she has to find a way back home while making new friends along the way.
Well, it could be about Danny finding himself in a parallel dimension where the rules of ghost - hunting are completely different. Maybe in this world, ghosts are the rulers and humans are the ones being hunted. He has to adapt quickly and find a way to either co - exist or change things back to how they should be.
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.
In a 'kaneki goes back in time fanfiction', perhaps Kaneki goes back to when he was still a normal college student. He then decides to study more about ghouls secretly. He could use this knowledge to try and find a way to co - exist peacefully between ghouls and humans from the very start. He might start by trying to change the views of some key people in the CCG, using his understanding of their future actions.
One possible plot twist could be that Ichigo discovers he has a special power in the new world that is completely different from his Soul Reaper powers. For example, he might be able to control the elements, which would change the way he approaches challenges.
Well, one possible plot could be that Kaneki struggles to fit into both the human and ghoul worlds from the very start. Since he's born a half - human, he might have some unique powers or abilities that neither humans nor ghouls fully understand. Maybe he tries to use his position to bridge the gap between the two warring species, facing a lot of opposition from both sides.