The anime is adapted from the light novels of the same name that come from writer Tetsuo Uesu.
With that slowly closing in on us we now have the first trailer for it with the dub.
The anime adaptation was set up at Production IMS where was directed by Hisashi Saito based on scripts by Takao Yoshioka and character designs by Yoshihiro Watanabe.
Testament of Sister New Devil - Season One – Coming Soon