Bon's little sister decides to join the cram school exorcism class but what will the rest of the class think of her? More specifically, what will Bon's rival think of her? A Rin Okumura x Reader story. RELEASE DATE: 22/04/15 STATUS: Unfinished - I do not own/am not affiliated with Blue/Ao No Exorcist. - I also do not own the cover picture but I own the collage. Fiend; A demon or evil spirit.