One idea could be that the reader is a new ghoul in the area and Naki takes it upon himself to show them the ropes. Maybe he teaches them how to hunt without getting caught. Another plot could involve the reader being injured and Naki protecting them from other ghouls who might see them as easy prey. A third plot idea is that the reader has a special ability that Naki discovers and they team up to use it for their survival in the harsh ghoul world.
First, really understand Naki's character. He's tough but has a soft side. So, show his protective nature towards the reader. Let his actions be guided by his loyalty and his need to belong. For the reader, give them clear goals and fears. Maybe they fear being discovered as a ghoul - lover or they have a goal of helping Naki find his place in the ghoul world. Use their interactions to drive the story forward.
Well, start by choosing a theme. Maybe it's about the reader character's journey to accept their new life as a ghoul or their struggle against the ghoul - eating nature. Then, focus on character development. The reader character should grow and change throughout the story. As for the Tokyo Ghoul elements, use the canon locations and events to add authenticity. For instance, you could set parts of the story in Anteiku or during a fight with the CCG. Also, make the interactions between the reader character and the Tokyo Ghoul characters believable. This might require you to study how the characters in the original series interact with each other.
One great Tokyo Ghoul x Reader fanfiction is 'A Ghoul's Embrace'. It has a really engaging plot where the reader character gets caught up in the complex world of ghouls in Tokyo. The author does an amazing job of portraying the emotions and the struggle for survival.
One highly recommended naki ghoul fanfiction is 'Naki's Redemption' on AO3. It delves deep into Naki's character, exploring his past and his journey towards redemption in a very engaging way.
The theme of forbidden love often comes up as well. In the Tokyo Ghoul universe, the relationship between a ghoul and a human is generally not accepted. So, in Nishiki x Reader fanfictions, there's often the tension of this forbidden love, with the two having to hide their relationship from others, whether it's other ghouls or the CCG.
You can try fanfiction websites like Archive of Our Own (AO3). It has a large collection of various fanfictions, including ones related to Tokyo Ghoul, so there's a good chance you'll find naki ghoul fanfiction there.
To write a good Uta x Reader fanfiction, start with a strong plot. Maybe it's about the reader getting involved in the ghoul underworld because of Uta. Develop the characters well, especially the reader character. Give them a unique personality and goals. When it comes to Uta, stay true to his character. He's a bit of an enigma, so keep that sense of mystery. Use vivid descriptions, especially when describing the dark and dangerous world of Tokyo Ghoul. For example, describe the alleys where Uta and the reader might meet. Make the dialogue between them engaging, and show their emotions through their words and actions.
The reader's character can be developed by showing their adaptation to the new world they are exposed to through Uta. They start learning about ghoul culture, their rules, and values. This knowledge might make them question their own beliefs and values, leading to a transformation. Also, if they get involved in Uta's life, like helping him in his shop or dealing with his ghoul friends, they will grow. Their reactions to different situations, whether it's a fight, a negotiation, or a simple conversation, all contribute to their character development.