Unaired episode to be bundled with 7th volume of manga adaptation on January 26

Kadokawa began streaming a preview on Tuesday for the original anime Blu-ray disc that will be bundled with the seventh volume of Kashiwa Miyako's The Testament of Sister New Devil manga. The video shows some scenes from the anime, and reveals the cover art for the seventh manga volume.

Note: The video is not safe for work.

The manga's seventh volume, along with the original anime Blu-ray disc, is slated to ship on January 26

The "rather risque battle action" story centers around Basara Tōjō, a first-year high school student who is flustered by a sudden question by his eccentric father, "Hey, didn't you used to say you wanted a little sister?" In addition, his father announces that he is getting remarried. His father brings over two beautiful step-sisters, but then embarks on an overseas trip. However, the two sisters Mio and Maria Naruse are actually a novice devil and succubus.

Basara almost ends up forming a dangerous servant and master contract with them, but due to an error, the contract becomes reversed, and Basara becomes the master instead. To add to things, erotic situations continuously start to happen in Basara's life. However, it turns out Mio is having her life targeted by other monsters and heroes. And so, the "desire/action" tale of the strongest contracter begins.

The manga adapts Tetsuto Uesu's ( Aesthetica of a Rogue Hero ) light novel series of the same name. Miyako launched the manga in Kadokawa's Monthly Shōnen Ace magazine in May 2013. Kadokawa published the manga's sixth compiled book volume on September 26. Seven Seas Entertainment will publish the first manga volume in North America in February 2016.