The delay was due to “various circumstances” in the production process of the original anime DVD.
The new anime DVD is the second anime DVD announced for the franchise; the first is shipping later in December with the 13th volume, after being delayed from its original release with the 11th volume on March 29.
The anime’s 23rd episode aired on March 11 as final episode for the main story.
The episode is an anime original story showing an encounter between Shizu and Diablo.