Renji

"Suffering in the limbo between human and beast, Ichirohiko succumbed to his despair. Kyuta must leave the dying Kumatetsu in the care of his companions to return to the human world, where Ichirohiko rampages through the streets of Shibuya. As their life-and-death battle begins, Kyuta must contend with both Ichiohiko's darkness and the darkness of his own heart ... But is there any way to save everyone? The times has come for Kumatetsu, Kyuta, and...

Having accidentally wandered into the beast world of Jutengai, Kyuta has gotten himself a master--Kumatetsu. But it turns out Kumatetsu's not quite as good at teaching as he is at brawling. The Grandmaster sends teacher and student alike on a pilgrimage to ask all the wisest beasts in the world a simple question: What is true strength? But are the boy and the beast ready for the answer?