Charming Boys School is the best school in the city. There are handsome boys all over the place. The heroine comes to this school disguised as a man in order to find high-level vampires. The vampires have a lightning mark on their body. The lighter the color of the mark, the higher the vampire's level. The one with the highest level can change the color of the lightning mark or disappear.
The heroine was originally an ordinary person who aspired to be a bad woman. Her soul went to the only survivor of the vampire Kambara family. In order to live forever, she went to find the highest-level vampire. However, there were no clues, only the admission notice from the charming boys' school. What should the heroine do? How did she find it? What if she meets the man in her life?