Hanato Kobato is on a mission: she has a wish she wants granted. To do this, she has to mend the wounded hearts of the people she meets on her journey and fill up a magical bottle with the suffering she has relieved. The only catch is, she can´t fall in love with any of the people she helps. It seems like that´s the least of her problems, though; Kobato has no clue how to mend hearts . . . especially since each person´s heart is different.
So what´s Kobato to do? Well, she has Ioryogi-san, a cute blue dog with a seriously bad attitude, to help (read: nag and critique) her . . . Yikes! Looks like the road to getting her one wish is going to be a long and hard one. Will Kobato get her wish in the end? And just what is it that Kobato wants?