Black torch. 4

"Jiro Azuma is descended from a long line of ninja, and he can talk to animals. One day he rescues a unique cat named Rago, a supernatural being, and is dragged into a mystical war... In order to save Jiro's life, Rago pledges loyalty to Amagi, his mortal enemy! But Rago has no intention of letting his power be used by evil forces, and so when he joins Amagi, he leaves all his power behind in Jiro. Outraged at the unexpected betrayal, Amagi unlea...