When the daughter of the ruler of hell, Enma, accidentally lets 9 balls of evil loose, she is sent to the human world to clean up her own mess. In the human world, she attends the local elementary school and attempts to explain the situation to her new classmates. To her dismay, none of them believe that she's from hell, and they don't seem concerned about the free-ranging evil balls affecting the people in the community.

A little girl called Shizuka, who also transferred into the school not long ago, decides to overlook Enma's weirdness and attempts to be her friend. Soon enough, the two of them end up working and playing together as they find and seal the 9 balls of evil! But what will happen when all 9 are sealed and Enma's time in the human world is over?