A Certain Magical Index, Vol. 19 (manga)

A powerful attack by God's Right Seat threatens Academy City. Aleister Crowley plans to use a corrupted angel's power to counter this threat. When Touma learns the identity of the angel, he is determined to save her. Meanwhile, Accelerator embarks on his own mission to rescue Last Order from Kihara, a dangerous enemy. As these two battles unfold, they may be more connected than they initially appear.