Nabari No Ou, Vol. 8

The aftermath of the confrontation at Alya Academy finds Yoite even more
broken than before and the four forbidden art scrolls now in the hands
of the Grey Wolves. As the remaining Banten shinobi regroup, Kouichi
decides to reveal his shocking past to his allies. But it proves to be
the last straw for Tobari, holder of the final remaining forbidden art
scroll-Engetsurin- who is spurred into making a sudden decision that
will send all the players in the Hidden World out on the hunt for him...