Ok, I guess I'll throw my line out there and see who bites:
For all these stories the genders are up to you: I'll have fun regardless!
In any of the pairings I'd love to play the more submissive partner, but it's not a deal breaker for me.
A human finds an injured fairy in the woods and brings it back to their house to take mend it's wounds.
A couple is growing accustomed to each other, and their sex life is suffering for it. One day one of them brings home a book, "petplay and you: beginner's guide to bdsm" and a shy smile...
A powerful wizard has been hard at work on a new, extremely powerful spell, and it's up to their loyal familiar (magical humanoid of sorts) to take care of the wizard and points of normal business while it's master is occupied.
These descriptions have been left vague on purpose so we can work out the details together! Sharing!
Let me know if you have any questions or want to play!