The Teacher Who Never Speaks

《This is an Blue Exorcist Story.》
A teenage boy comes to True Cross Academy, he was sent over to teach the exwires the importance of self control and sense of justice. When he meets his class he isn't impress by their behaviors, especially the small fights that break out from Rin Okumura and Ryuji Suguro. Not ever talking the teen decides to take matters into his own hands. Will he gain respect? Will Mephisto let him? Will the boy ever speak? Read to find out!