Blood Is Thicker (Minewet Vampire/Bloodslave AU)

Vampires have taken over the Earth. They have killed more than half of the human population, and what mortals are left they feed off of as they please.
Muse A (Minho) is a vampire from one of the wealthiest families. Muse B (Newt) is one of the few rebel slayers in hiding, who spends their time killing as many vampires as possible without getting killed.
During one of their attacks, Muse B becomes careless and gets caught. As punishment, rather than being killed immediately, they are taken to the auction, a place where only the most elite vampires purchase personal blood slaves.
From the moment Muse B is brought in, Muse A takes a liking to them, placing the highest bid.