Chapter 21 of Volume 17 is 10% translated.
This post will be updated as more of the volume is released.
As always, comments are appreciated.
Translation – defan752, luacs1998
Editing – CJ, David Ruegg, Aozora Kei, defan752, ZeHaffen, Adam, Shiina, DarthMewtwo
Scans – ruranobe.ru
Illustration Editing – Mttblue2
Consultation – SAO Wiki