What would you do if you were told to die for the sake of the world!?

Mashiro Ouha was leading a slightly boring, but more importantly, normal life until the day she got attacked by 'Ghosts'! Yamato, who came to her aid, turned out to be a creature of the night and an an enemy of humanity!? The time has come for the bewildered Ouha to make a difficult decision! Let this dark romance begin!!

(Source: Mangatraders)