Yuuto accompanies his friend to Aqua Eden, a special island city (to find some hookers). During their visit, the protagonist by chance tries to prevent a kidnapping but… somehow he got turned into a vampire instead! And so he starts attending a vampires only school. Interestingly because the perceptions of vampires are different from those of human beings, he found several girls who were irresistibly attractive to him, in a sexual way, for some random reason… And so begins our protagonist’s new life of ero-happenings!