Volume 20 illustrations
Google translate:
By the way, Kawahara-san in the postscript "In these two volumes, the story of Moon · Cradle is complete for the moment ... but it is not yet said that the case was completely solved ...", " The story is divided into 20 volumes, and from 21 volumes return the stage to the real world, a new story of Kirito and Asuna of high school students, not rulers, will start. "