Kyūketsuki no wa-sama no ai Kyūketsuki no wa-sama no ai 100% 11

This is a story about the master-servant relationship between a vampire named Nowa and a human named Kuro.
In the second half, the woman becomes a futanari. ( it refers almost exclusively to characters who have an overall feminine body, but have both female and male primary genitalia (although testicles are not always present, while breasts, a penis, and a vagina are).