Feared as one of the two biggest "bad" vampires, Eleonore was sick because she was indiscriminately sucking blood. At that time, she... sucked the blood of a healthy boy she met by chance, and she decided to wake up to her health "food" orientation! She signs a contract with him to suck his blood deliciously every day, and the two live together...!? Mysterious heartwarming blood-sucking life!