Long ago, in the far reaches of space, there existed a world as pure and blue as the Earth. And on this world, there lived two "Queens" with the power to control it. When the world is thrown into chaos by one of those queens, a young boy and a young girl must stand up to challenge her for the sake of protecting all that they hold dear
Tags on Batoto: 
Action Adventure Fantasy Psychological Romance Seinen Tragedy
Yeah this is not a happy manga, despite what the art might fool you. This is a cosmic horror story set after the end when the forces of light were vanquished and darkness has taken control of the world, whose queen is able to shape that world however she sees fit.
http://www.batoto.ne...tail-star-r3853
Read it 
