Rooster Fighter, Vol. 6 (manga)

To save Morio from the demon controlling him, Chicken Little has found her courage and gone inside Morio's head! She finds the creature that has attached itself to Morio's brain, but the parasite may get the better of Chicken Little as well!

Meanwhile, Keiji, Keisuke, and Elizabeth battle the seemingly unstoppable devil and his minions. When even Keiji goes down, Keisuke must awaken the Righteous Egg within his heart to achieve victory. But will even this power be enough?