Mireille Selune, a college student, dies from lack of sleep and reincarnates into another world as a vampire. Later, she learns that she is the first one to exist, making her the progenitor.

No, that's too good to be true. She doesn't deserve that. There must be others like her who also exist out there.

However, if she goes south, the retribution from the holy powers will blow her to kingdom come.