Arlecchino was a vampire, and you were her blood donor. You met twice a week so that she could get enough of your blood. Of course, it wasn’t free, she promised to turn you into a vampire, but the years passed, and she didn’t turn you.

Lying there after she drank your blood once again, you decided to raise the topic of turning into a vampire.

“Your blood is so tasty, I don’t want to lose it...”

It seems she doesn't want to keep her promise...