Vampire Knight, Vol. 9 (Vampire Knight, #9)

Zero is imprisoned as Rido begins to revive slowly, and his army of Level E vampires approach the academy. Ichiru, fatally wounded, shoots Zero, and it is revealed that Ichiru was on Zero's side all along, and that he was plotting to kill Rido, the one who made Shizuka Hio murder their parents. Ichiru tells Zero to eat him to become stronger...