Ranmaru Mori, a 450-year-old vampire working at a bathhouse, craves the blood of an 18-year-old virgin. He’s watched over pure-hearted 15-year-old Rihito for years—but when Rihito falls for classmate Aoi, Ranmaru panics. If love blooms, virginity is lost! Now begins Ranmaru’s desperate <Operation Virginity Protection>, driven by the resolve: “I must not let him fall in love!”