Blood Domination

Among vampires, individuals carry a "second gender" — either dominant or dependent. When two vampires of opposite second genders encounter each other, they are able to form a "bond contract." Eclair Gymnasium Academy is a school for young vampires where forming such a contract is part of the curriculum. Students are required to find a compatible partner within a set period of time. Blood, apparently, has its own ideas about who ends up with whom.