A doll that gives you dreams in exchange for your possessions... a blessing or a curse?

Tucked away in the mountains and cut off from the rest of the world, Rosa Academy is your typical boarding school... at least on the surface. Like most schools, it has its share of urban legends. But, as Raum and his friends—Tulli, Yan, and Karel—are to find out, there is more to Rosa Academy's legends than meets the eye...

Yuuki has a problem: evil spirits are attracted to him. But one day, he meets a kid that can devour those evil spirits for him. Yuuki’s not sure whether that’s a good thing or a bad thing…

From The Zero Alliance:
The temple protects the City of Sound by having hymns sung every day.
But why does the sound echo throughout the temple? Why does the song seem like a requiem?
And why are the hymns so important that…. the city will collapse if they stop?!

In order to sustain a world on the verge of death, two groups, Blanches and Noires, vie for dreams. Every six months, the group with the fewer dreams has to send a number of members to the human world, where they will eventually die. Heki, a Blanche, fights to get ahead of the game, so he doesn’t have to see his friends shipped off... again.
(Source: Storm in Heaven)