Bound to a Monster

" I killed a man with power I didn't Know I had but not intentionally I'm a healer not a murderer" Cassia Throne brutally kills a man by mistake in public and now she was going to be hung to death, hours before her execution the Vampire King proposes marriage to her she reluctantly agrees, that's her only option, the only way she could stay alive, he married her just to use her and make her suffer, but he appears to be falling for her, a cold , ruthless Vampire King falling in love? Impossible!