Meet Kobato Hanato, a sweet and rather simple young girl on a quest to have her single, dearest wish granted. But first she must learn the ways of the world from Ioryogi-san, a gruff blue dog whose bark is just as bad as his bite! Under his 'tutelage' (read: constant verbal abuse), Kobato puts her efforts into passing various trials of common sense so that she may obtain the key to getting her wish - a magic bottle which must be filled with the suffering of wounded hearts that Kobato herself has healed. But with Kobato's commonsense sorely lacking, she keeps flunking Ioryogi-san's trials left and right! It looks like the road that lies ahead of Kobato will be a long one indeed!