User blog comment:B214/Season 3 confirmed!!!!!!/@comment-117.195.121.73-20150404165137/@comment-24502975-20150404172129

Reaching volume 12 is a perfect ending-place for the anime, but with TNK's working ahead  (with a new OVA already, they probably have at least some plans for S4 by now) and Ishibumi taking a break from the LN (assuming the LN ending would mean the end of the anime) I still hope we could get arc 4 animated one day.