An OVA that will be bundled with the seventh volume of the Shinmai Maou no Testament manga, to be released January 2016.

Twelve Months is the story of an orphaned girl named Anya. When a spoiled princess, who is also orphaned, sees a picture of a Galanthus, she immediately wants one. However, the Galanthus only blooms in spring, in the month of April. It is New Year's Eve and there was no way that such a flower can be found in the middle of the winter. The princess offers a basket of gold to anyone who can bring her a bag of Galanthus.

Unaired episode 13 included with the fifth Blu-ray and DVD volume.

Lucifer has been awoken from his eternal slumber by the spirits of Eris, Abel and Poseidon. He has come to kill Athena and fulfill his heart's burning desire: becoming the strongest of all the gods.