One idea could be a BSDM relationship set in a historical period, like the Victorian era. The strict social norms of that time could add an extra layer of complexity to the power dynamics in the BSDM relationship.
Classic literature is another option. Works like 'Pride and Prejudice' offer in - depth character studies, beautiful language, and engaging plots that are far from the inappropriate nature of BDSM - related stories.
The unique aspect of RWBY BSDM fanfiction is the blend of two distinct concepts. RWBY has its own set of characters with their powers and personalities, and when BSDM elements are added, it creates a whole new dynamic. For example, the power dynamics in RWBY can be explored further in a BSDM context, like how a character's strength or weakness can play into the BSDM relationship.
You can start by creating a setting. It could be a private BDSM club or just a normal apartment where two people explore BSDM in a more private setting. Then, think about the initial encounter between your characters that leads to the exploration of BSDM. Maybe it starts with a simple conversation about desires.
One alternative theme could be adventure. Imagine Betty and Veronica going on a treasure hunt together. They could use their different skills and personalities to overcome obstacles along the way.
There's also 'The Submissive Huntress'. It delves deep into the BSDM aspects while still staying true to the RWBY universe. It shows how the characters adapt to this different dynamic, and the writing is quite good, with detailed descriptions of the relationships.
One interesting story could be about a couple who found a new level of intimacy through BSDM in a club. They explored light bondage and domination/submission roles which strengthened their bond. Another might be a person who discovered their long - hidden dominant side in the club environment and how it changed their self - perception.
Since BSDM fanfics are not in line with general ethical and moral standards, it's better to shift the focus to other aspects of Betty and Veronica. For example, there might be fanfics that are set in a different time period, like the 1920s, where they are both part of a socialite group and their interactions are based on class differences and the pursuit of their own dreams within that society.