One day, Watanabe Tsuna went to visit princess Katsuna. To his horror, he chanced upon a man drinking blood from his beloved princess! In a fit of fury, he cut of the man's hand only to realize the man was none other than his childhood friend Ibaraki Douji! What is going on here?
Volume 1: Tobu Hana (Flying Flower)
Volume 2: Tsuki no Tamago (Egg from the Moon)