During a moonlit night, Do-Gyeong's path crosses with a vampire sporting blood-stained lips. Initially dismissing it as a mere dream, he soon finds out that the vampire not only attends his school but also shadows his every move. Despite his initial terror, Do-Gyeong uncovers the vampire's oddities like a taste for well-done meat, a fear of felines, and a penchant for affection. As the vampire's fixation on him deepens, the mystery of their connection unravels, leaving Do-Gyeong puzzled and intrigued.