Beg and Regret to Death

Synopsis:

“I clearly told you. The moment you come back, I will kill you.”

Melonie Cassus, a vampire hunter, is on a quest to find the vampire king who killed her parents.
Her only clue leads her to the high-level vampire, Cain.

“Mel, someday I’ll kill you.”
“Try it if you can.”

Melonie humiliates Cain by putting a collar on him, but accidentally ends up giving her blood to the vampire.

Yet, why does she feel so comfortable around this disgusting vampire?
She had tried to leave him to avoid developing any emotions, attempting to forget him.

“I… I was wrong.”

Then why did he bite the very collar he despised and show up again?

“Don’t abandon me.