Rosario + Vampire2008

Tsukune looks to be a typical high school student, but his grades are bad to the bone. Rejected by school after school, he finally gets accepted by an academy that's more than a little out of his neighborhood. Unfortunately, it's a school for monsters and Tsukune is the lone human! While forced to hide his secret, along comes a cute - but hungry - vampire girl named Moka. Beneath her cute and clumsy exterior, she too is not exactly as she seems...

Tsukune's a real slacker in the human world, but in the monster realm he scores an A+ as a high school heartthrob. Keeping up with a hellacious bunch of hot demon girls has its perks, but Moka's bratty little sister could burst the love bubble. His pain is her pleasure - and if the tart has her way, Tsukune can kiss Moka's sweet side goodbye.