Karin Maaka can bite a throat like a proper vampire, but where others of her kind need hot red blood, she has too much of it! Every month, she's compelled to inject blood into her victims the way a snake injects venom. And her handsome classmate Kenta Usui makes her feel like she's is going to spurt blood like a geyser. Talk about embarrassing! When Karin's latest victim turns out to be as rich as he is good looking, it causes hilarious chaos at her school. Will she ever live in peace?