By a bizarre coincidence, Aono Tsukune has accidentally gotten himself admitted to a Youkai Academy, a school attended by monsters. Realising that he has entered another world riding the school bus, suspicious of the very creepy forest leading to the school, just when he is about run away, he meets the beautiful Akashiya Moka, instantly falling for her feminine charms.

But from here on his problems only seem to get bigger: Not only that the kind and sensual Moka turns out to be a vampire, who loves to suck Tsukune's blood ("chu"), she transforms into her true form when the rosary on her chest is removed, turning into the very powerful and ruthless vampire, Ura Moka!

How will Tsukune, the only (weak) human in this monster academy, make it through the semester?

[Source: AniDB]

A year has passed since Tsukune was sent to the Youkai academy. Tsukune has gotten used to life there, or so he thought. As a second year, he and the girls are looked up to by the juniors. On the first day back to school, a sudden encounter with Shuzen Kokoa, takes a turn for the worst. What Adventures or should we say, misadventures await our human, vampire and friends?

[Source: MyAnimeList]