The Right Arm of the Saint III.Kojo reveals to Yukina that he has limited control over his own familiars because he has yet to act like a vampire and drink a human’s blood. Natsuki Minamiya-sensei meets with Kojo and Yukina and warns Kojo that he may be in danger. After enlisting Asagi Aiba's research assistance, the two investigate an abandoned homunculus research facility. While they explore it, Eustach and Astarte appear and a fight ensues in which Kojo is decapitated. Eustach leaves them to continue his mission.