The official website of the Summer 2015 series Overlord announced that each Blu-ray and DVD volume will include one mini anime episode featuring SD (super deformed) characters. The first volume, which will be released on September 25, 2015, will contain three episodes. Customers who pre-order the first volume from Animate, Gamers, Sofmap, or Toranoana stores will receive a bonus A3-sized clear poster.

Six volumes of the Blu-ray and DVD will be released for a total of 13 episodes. The first, fourth, and sixth volumes will contain newly written stories by Kugane Maruyama. Additionally, the second and third volumes will contain special audio dramas, and the fifth and sixth volumes will contain soundtracks from the series.

Overlord is an adaptation by Madhouse of the light novel series of the same name, written by Maruyama and illustrated by so-bin. It begins airing on July 7.

Source: Moca News