In a post-apocalyptic world of vampires vs. humans, Yuichiro brings vengeance upon his vampire overlords!After trumpets of the apocalypse proclaim the fall of humanity, vampires arise from the shadows to rule the earth. Yuichiro wants just one thing—to get revenge by killing each and every vampire.On the way to Guren's safehouse to finally get the details on his true plan, Yuichiro drops a bombshell of a question on him: "Did you kill my family?" Guren hesitates to answer, and Yuichiro, wanting a clear response no matter what, challenges him to a fight. As the two battle, Guren comes to realize Yuichiro's growth, while Yuichiro is reminded of Guren's strength.