This is a cute little manga about a reverse vampire named Karin. Instead of sucking blood out of people, she puts it in them. Her body produces extra blood, and if she fails to expel it into another person she gets massive nose bleeds (we’re talking murder scene amounts of blood). When injected into another person, the extra blood gives them extra energy, so it can be a great deal for her “victims.”
Unfortunately, being the exact opposite of all things traditionally vampire (she also loves sunlight, bright colors, cooking, etc.) makes her kind of a freak among other vampires and an outcast in her own family. Her parents are convinced there’s something wrong with her, her older brother wants nothing to do with her, and her younger sister is often called upon to clean up Karin’s messes because Karin doesn’t have any magic of her own.
To complicate matters, Karin is seen during one of her backwards feedings by a boy who just transferred into her class who misinterprets what he sees as Karin selling her body to an older gentleman in a park. She wants to explain that she’s not a hooker, but can’t tell the boy she’s a vampire either.
As you might expect with this sort of premise, the story can be quite silly, and sometimes a little gross, but it’s also very sweet. There are a lot of subtle interactions between Karin and her family as they grow to accept her and try to deal with her strange ability. There are also a lot of hilarious misunderstandings between Karin and her classmate as she tries to be friends while keeping her secret.
Typical of this type of book, the writing is primarily dialogue and internal monologue with a few descriptive phrases thrown in to give context. The art is standard cutesy manga. The entire book only takes about an hour to read but, as with most manga series, it cuts off without any real conclusion to prompt you to continue on to the next book.