Ruri is stranded in a strange world by her selfish friend. Then she gets the ability to turn into a white cat! In the perilous Land of the Dragon King, she must always hide that she's human. How can she get revenge in the form of a cute little cat?!
A thousand years ago, there was a feared tribe of super-powered vampires called "True Bloods" that have since disappeared—except for the youngest, Ristia. Awakened from her slumber, she has one desire: get herself a little sister to dote over!
To Princess Rosemarie, anyone showing negative emotions appears to have the head of a beast. So she rushes to marry Prince Claudio, whose features remain human. But she finds out the reason too late: he has a real beast head, and it's her fault!