But when these seemingly normal girls reveal themselves as demons—Mio the former Demon Lord's only daughter and Maria her trusted succubus servant—Basara is forced to reveal himself as a former member of a clan of "Heroes," sworn enemies of the demons. However, having begun to care for his new sisters, Basara instead decides to protect them with his powers and forms a master-servant contract with Mio to keep watch over her.
With the Heroes observing his every move and the constant threat of hostile demons, Basara has to do the impossible to protect his new family members. Moreover, the protector himself is hiding his own dark secret that still haunts him to this day...
English: The Testament of Sister New Devil
Synonyms: Shinmai Maou no Keiyakusha
Status: Finished Airing
Aired: Jan 08, 2015 to Mar 26, 2015
Season: Winter 2015
Studio: Production IMS
Duration: 23 minutes
External Links: MyAnimeList
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