Boy and the Beast, Vol. 4 (manga)

Ichirohiko has suffered,
caught in the space between human and beast, and has succumbed to the darkness.
Kyuta leaves Kumatetsu, on the brink of death, in the care of the others and
heads to the human world in pursuit of Ichirohiko. It's the start of a life and
death battle in the streets of Shibuya to settle things not only with
Ichirohiko, but with the darkness in his own heart...!! What can he do to save
everyone? The times has come for Kumatetsu, Kyuta, and Kaede to each make their
own decisions...