Chocolate Vampire

Karino, a girl who had been imprisoned, was finally allowed out into the world where magic was the norm. Karino possessed magic power, but she didn't know the proper incantations. So she enrolled in a magic academy with Touma, the boy who rescued her, in order to learn how to use her magic. (Source: Sho-Comi, translated) *Note: Includes one extra chapter.*

The human girl Chiyo and the vampire Setsu have made a blood pact as children, which binds them together. Having grown up in the meantime, the two attend a school where vampires and humans are taught together. Recently, rumors about a dangerous drug called "Spice" have been circulating there. This drug is supposed to improve the powers of the bloodsuckers so that everyone is crazy about it. As a member of the campus security force, Chiyo is in charge of the investigation. But suddenly, unknown persons kidnap Setsu's brother! Does the culprit have anything to do with the drug...? (Source: TOKYOPOP Germany, translated)