Fleeing an arranged marriage, the princess of heaven hides on Earth as a high-school boy. However, as a side-effect of having her power sealed to stay off the radar, "he" is unusually prone to getting posessed... which tends to draw attention.

In volume 3, there is also an entertaining subplot where, due to tradition, modes of dress, and childish mistakes, some characters assume that events in their childhood related to another male character rather than his sister.

Furthermore, his sister, a poweful warrior in her own right, keeps getting suspected of being the princess because, without all the make-up she wore for her portrait, the main character can easily pass as an ordinary average person.