Yan Yue transmigrated into a story and became its vicious female antagonist.
The male lead, Gu Qing, is a pitiful little vampire: delicate and frail, twisted and perverse, scheming and cold-blooded. He seems gentle and sensible, but in truth, he keeps a knife up his sleeve.
As a child, he was taken to the Contract Valley of a blood-hunter family. After he dirtied the original owner's white dress, he became a blood kin supposedly awaiting a contract with her.
The original owner thought him too weak and refused to form a contract with him.
Only later did she learn that his true form was none other than a prince of the blood kin.
After dying once, Yan Yue wakes to find the child Gu Qing, a little vampire, sitting by her feet. Yan Yue: "???"
I absolutely won't make the same mistakes again!
Later
Pinned beneath someone as they force a contract on her, Yan Yue struggles and cries, "I'm your older sister!"
With a smile in his eyes, Gu Qing kisses Yan Yue's lips and murmurs in a low, husky voice, "This way, you'll never be able to leave me, Sister."
Theme: May every encounter find a happy ending.