After Becoming My Arch-Enemy's Nanny [Western Fantasy]

If time could turn back, Mulan Rodney swears she would serve the Goddess of Light with all her heart and soul. She would never covet the goddess’s underwear again!! So, Goddess of Light, please get me out of this godforsaken place already!!! In her past life, Mulan was a street-corner swindler pretending to be a fortune-teller. In this life, she has risen to the highest rank of swindler: the pope! She is the Goddess of Light’s most "devoted" follower, and everything she says and does is concerned with the goddess (and her underwear). Thanks to her formidable abilities (of talking people into things), she is respected by the masses and hailed as the most gifted pope in history. The Goddess of Light thinks very "highly" of this follower of hers, so she sent Mulan tumbling into a time-space rift, where she arrived ten thousand years in the future, in the Dark Age. In this era, the gods have departed and the demons are invading. Mulan is badly injured, her powers have dwindled, and light element is hard to replenish... That would be bad enough, but why does she have an extra burden to look after? And the most important thing is, that burden is a vampire! Have you ever seen a pope babysit a vampire? Oh, goddess! Have mercy on me! When I get back, I’ll devote my whole self to serving you! Vampire prince: Your whole self belongs to me! Mine! The Goddess of Light can’t have so much as a single hair! CP: A cheerful, smooth-talking pope who likes to play the bottom × an extremely possessive vampire prince