Story
Humans, monsters, those inhuman——
The 'world', does not tolerate them.............

Strange incidents occur unseen in the town of 'Tsurugichou'.
It's a battlefield where various 'disasters', 'curses', and things concerning them gather.
People with unique abilities called 'Enja'. And, the thing that is their origin── 'Devils'.
As if swallowed up by an invisible vortex they get together, and then, kill each other.

Sora Shigure is, an Enja boy.
Some years ago he lost his parents, and now he lives alone while attending Hakurei private school, his everyday calm and restful, and colored with destruction.
With friends, an ordinary school life. Every night having mysterious dreams. Mortal combat with devils that appear at night in the city.
His 'contract' takes him to a hell of tragedy, battle, and massacre.
And then, he happens upon it. A new 'contract'. And the girls who have it.

Love.
Subordination.
Servitude.
Corruption.
Desire.

Knowing neither affection nor love, what will he, a broken human, gain and lose in the 'contract' with the girls.
And at that 'contract''s end, he happens upon it.
The final devil, and.............