Long ago there was a battle between two races.
White star race was looking alike humans, but with wings, and they wanted love and peace. The Black star race was with horns and black wings, and they desired fighting and power. The fight was fierce, and both mother stars got destroyed as a result. White race moved to the dark side of the moon and is now called angels. Black race moved to Mars, and they are called demons.
Angels can no longer be born, so to continue but chosen from the Earth girls, and of course demons would be in the way, so their conflict continued on Earth.
Protagonist is an angel who comes to the Earth in search of marriage partner to become and goddess and continue angelic line.
[From
vndbreview]
