Kusanagi Kei, a high-school student living with his aunt and uncle, has an encounter with a female alien. This alien is revealed to be a new teacher at his school. Later, he is forced to marry this alien to preserve her secrets. From there, various romantically-inclined problems crop up repeatedly.
![Image [C] The Money of Soul and Possibility Control](http://i0.wp.com/image.tmdb.org/t/p/w300/qtJi38lUQut2USuI07A1dX4KJ3D.jpg?resize=300,450 "Image [C] The Money of Soul and Possibility Control")
