Sword Art Online 15 (Light Novel)

Adminstrator's defeat has come at a heavy cost: The death of Eugeo as well as the mental decline of Kirito. Six months after the epic battle, Kirito spends his days in the Underworld wheelchair-bound; bereft of emotion or a will to live. Although Alice and Bercouli do what they can to help him, it isn't long before the armies of the dark territory start to move in earnest.