Sword Art Online 10 (light novel)

Two years after waking up in a mysterious fantasy world, Kirito and his oddly human NPC friend, Eugeo, continue their quest to become Integrity Knights--and find Alice, who disappeared so long ago and yet has somehow lingered in the back of Kirito's mind. Their journey takes them to the Imperial Swordcraft Academy, where they must train to become two of the top twelve seats in the class to have even a hope of seeing Alice again. Meanwhile, as Asuna desperately searches for Kazuto Kirigaya, she stumbles across the deeper secret of his new world...