User blog comment:B214/Light Novel Volume 16 spoilers/@comment-23847729-20140128181036/@comment-16281343-20140131202823

No one knows. Ishibumi could stretch out the 3rd semester or not. The 2nd semester took 13 Volumes (Volume 5 - 17). But that is because the 2nd semester has lots of school events in it, and that means more settings to use. So.. maybe 3 to 5 Volumes?