The Testament of the Sister of the New Devil is a Japanese novel series written by Tetsuto Uesu and illustrated by Nekosuke Okuma. Kadokawa Shoten has published twelve volumes since 2012 with her publishing house Kadokawa Sneaker Bunko. The manga adaptation has been serialized in Shōnen Ace Kadokawa Shoten magazine since May 2013. A second adaptation of the manga has been published in Young Animal magazine by Arashi Hakusensha since February 2014. The first season of the anime TV adaptation premiered on January 7, 2015. An episode of OVA aired on June 22, 2015. The anime’s second television season premiered on October 9, 2015. The second episode of OVA was released on January 26, 2016. The third episode of OVA was released on March 28, 2018.
The Testament of Sister New Devil
Shinmai Maō no Tesutamento
Episode – 01 – 22
Status – Completed
January 7, 2015 – December 11, 2015
Basara Tojo is a high school student at Hijirigasaka Academy when his father Jin suddenly “remarries” and asks Basara if he wants to have sisters. Basara meets his two cute half-sisters, Mio Naruse and Maria Naruse. After his father travels abroad, Basara quickly discovers that the two sisters are actually part of a demon clan and should be with the hero clan.
Mio, a demonic princess, forcibly tries to conclude a master-servant contract with Basara, but Maria has the opposite, with Basara as a master. Basara then continues to participate in ecchi scenarios, mainly to protect Mio from the persecution of other demons haunting her legacy passed down from former Demon Lord Wilbert.