Vampire Game (吸血遊戯, Kyūketsu Yūgi) is a manga by the Japanese author and artist, Judal. It originally ran in the monthly manga magazine Wings, with its last chapter serialized in the November 2004 issue. The series has 15 volumes in all. It was licensed in the U.S. by Tokyopop.
Source: “Judal”, English Wikipedia (CC BY-SA 4.0), excerpt