Nora ~ Kazunari Kakei
Nora, an unruly demon, has defied his superiors one too many times. For the sake of his "education," Nora is sent to live among mortals and enters a bond of servitude with cool-as-ice star student Kazuma Magari. Kazuma is about to learn the ways of the underworld...and Nora will learn more from the "real world" than he ever thought possible!
The most powerful demon in the underworld is sent to earth for being a cocky jackass, and an extremely calm and collected student turns him into his pet. Then they both go around kill "evil demons" (as opposed to "good demons" ¬¬).
I've read the first SJ Advanced volume published by VIZ, and I'm taking a liking to it. I don't really find the plot as deep or interesting as others, but it's fun to read. :3