Originally Posted by Katapan
BD/DVD vol. 1 and 2 will be released simultaneously on 11/7 (quite the odd marketing strategy there). They respectively include episode 1 and episodes 2/3, which seems to be suggesting that this is a 1-cour series.
Neowing (CDJapan) has a listing for 7 volumes of the BD/DVDs, ending with ep13. So it looks like you're right.