Sword Art Online Novel 24

A reunion with Seijirou leads Kirito, Asuna, and Alice back to a version ofthe Underworld where 200 years have passed since the Great War. There, they findnot only the descendants of Ronie and Tiese, but also a man claiming to be theleader of the Integrity Knights, whose eyes resemble his eyes-the one Kiritolost. Meanwhile, in the world of Unital Ring, the ultimate malice targetingKirito and his friends finally reveals itself!