Before I started making this game I intended for the dom and sub positions of the two characters to be swappable.
I'm sure you're wondering that if I can swap the two characters with each other, can I make character art for other characters to be swapped into the scene? Yes, but it takes a lot of work. I might add a generic male character to take the dom position for players that want a male x female scene, but adding more characters beyond that is something I'll consider for a future update.
The big next step is to add voices and face animations. There's a good chance I'll hire VAs for the two characters so if you know someone who can do either of these characters' voices let me know. After that will be the climax, and then the game will be like 90% done.