[BOOK 1] Si Kathryn ay isang transferee sa St. Trinity College. At sa di inaasahang pagkakataon, naging member siya ng Student Council, at naging assistant siya ng SC President. Na mga BAMPIRA pala. School life.. ruined.
Cindy is just a typical girl who has a crush on Sein, the "guitar guy" of their class. And this guy's hobby is to play the guitar and sing out loud with the other boys in the class. Cindy turns out to be the girl who's just sitting there, listening to their songs and secretly sings with them.
