Antisocial, dorky boy seeks fun-loving, sexy vampire for blood-sucking and transforming into her minion.

Nanakusa is a vampire. That’s okay with human Ko, he wants to be one too but transformation doesn’t come that easily...

To sign up for his class trip to Hokkaido, Ko has to, well, go to school! His estranged friend Mahiru decides to travel to the island as well, along with an unwelcome companion (unwelcome to Ko and company, that is). And things only get worse when Ko’s fanged female followers join him and Akira on the train ride there!