Well I have an small idea wrapped around a mithra, and a Galka..
Maybe she goes out on a mission to stop some Pirate captain...Or a large warrior, tormenting a village and instead she fails her duty and he takes her as her pet.
rough idea.
i love size difference.Large cocks, rape that turns to enjoyment? Lots of cum
smutt and story. though need help fleshing out a story for this