A brash pilot named Ragna who is forced to partner up with the haughty vampire princess Alwen after she saves his life in exchange for a blood contract.A brash pilot named Ragna who is forced to partner up with the haughty vampire princess Alwen after she saves his life in exchange for a blood contract.A brash pilot named Ragna who is forced to partner up with the haughty vampire princess Alwen after she saves his life in exchange for a blood contract.