What happens when a new exorcist arrives at the Black Order? This isn't new; they get new exorcists all the time. But this one's different. She's related to another exorcist, and is bound to fall in love with another. So the new question is, what happens when the newcomer starts to love the one person her own brother can't stand? Does he even love her back? And what will Kanda do to stop it all?

I'm Akira Walker, yes, I'm related to Allen Walker, not by blood though. He found me on the streets. I'm about to join the Black Order. Allen nii-san joined a year ago. I miss him. Since the time he found me on the streets, he's been leaving and then coming back again. Some dude named Cross Marian always leaves with him. Now, I can stay with Allen nii-chan. We might even get to go on a mission together!! But Allen nii-san told me this was dangerous work...