A visual novel about offering blood up to get closer to the person you are.
The story of a boy, or a girl, or a person. Who meets with a woman, or a vampire, or... And the person gets whisked away as a girl. Which is what she always wanted. Or they always wanted to try. Or A short 6,000 word story, or wasn't it more like 7,000... With just the one ending, surely there couldn't be another.