Karin Maaka can bite a throat like a proper vampire, but while others of her kind crave hot red blood, she has an excess of it! Every month, she is compelled to inject blood into her victims, much like a snake injects venom. And her handsome classmate Kenta Usui makes her feel as though she is about 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?