Hitokuchi Choudai

Sasame Yui, a descendant of vampires, feels out of place in her high school class. Unable to fit in with her human classmates, shes often late to school something that the class representative, Sekiya, relentlessly criticizes her for. One day, angered by Sekiyas nagging, a dark impulse flickers through Yuis mind *"Maybe I should just suck him dry."* But that thought marks the beginning of something far more danger...