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After being hit by a truck, she gets reincarnated and is mistaken as a vampire so she's sold to a vampire.
She becomes his maid in order to live but they fall for each other.
No really a reincarnation nor teleportation into another world but :
Dying with regret of how she loves her life until her death. She gets to live her life again, times turns back.
Smut alert, no reincarnation but :
Ga-Yeon, a woman who was getting tired of boring men, finds herself falling into the world of the Kashan Empire and becoming the concubine of Emperor Xeros. He's handsome, fit, and he even has a cute side! This is how Ga-Yeon’s story of taming the awkward emperor begins?
The Maid and the Vampire