DreamGen Opus is a family of uncensored models fine-tuned for (steerable) story writing and the model also works great for chat / RP.
Official prompting guide: https://dreamgen.com/docs/stories
Example prompt:
<setting>
(Setting provides general overview of the story and characters)
This story is a twist on the traditional Little Red Riding Hood story.
In this variation, the Little Red Riding Hood and her grandma are secretely werevoles.
</setting>
(Previous part of the story, potentially empty)
<instruction>
(Setting tells the model what should happen in the next few sentences / paragraphs)
The Little Red Riding hood confronts The Big Bad Wolf, transforming into her wolf form.
</instruction>