Welcome to KuroTenshi.

There are two sides to death.

The selective, secretive angelic race, who destroy souls they deem unworthy and employ those acceptable and the militaristic fey, who release all souls into the spectral world.

These two sides have kept a tense peace for centuries, but when both of them believe the other is unnecessary, it cannot last.

Enter Kaoru, a wingless orphaned angel. Abused by her peers and superiors, she has become rule-obsessed and lost any self-respect she may have had. She's been sent down to earth, the only neutral space in the universe, to speak with a representative from the Fey, an exchange that will decide whether the peace will continue.

Unfortunately, that representative is a hyperactive, frequently indulged brat who only got put in charge of such an important diplomatic exchange because her father holds an unchallengeable rank among the fey, and cannot say no to his only daughter.