I Willingly Fall into Your Hands and Become Your Plaything

In a world ruled by vampires, society is divided between vampire nobles and ordinary humans who resist their oppression and fight back. Humans sealed by vampires become blood slaves. They retain their own minds, but their bodies are controlled by vampires, and they remain enslaved for life. Some blood slaves, if their vampire masters so desire, even lose their minds entirely, becoming puppets who exist only to obey.

A cold, heartless vampire king, the bottom × a possessive top who hides his identity and becomes a blood slave

A sweet story. (Entirely fictional.)