Red Diamond

A rare blood born every 1,000. Among vampires, this blood is considered a fantasy: "Red Ruby." This blood is born only in humans. Those possessing it are called "Red Diamonds" and are a target for vampires. Among vampires, a select few possess exceptional class and strength. They are called "Blue Sapphires." Due to their immense power, all blood except "Red Ruby" tastes indistinguishable. Once a taste of "Red Ruby" is experienced, one becomes addicted and unable to escape. "Blue Sapphire" seek