![1girl arms_behind_back bad_id bad_pixiv_id belt breasts gloves groin halter_top halterneck highres joker_(animero) long_hair midriff naruse_maria navel panties pointy_ears purple_eyes shinmai_maou_no_testament silver_hair small_breasts smile solo striped striped_legwear tail thigh_strap thighhighs twintails two_side_up underboob underwear rating:q score:17 1girl arms_behind_back bad_id bad_pixiv_id belt breasts gloves groin halter_top halterneck highres joker_(animero) long_hair midriff naruse_maria navel panties pointy_ears purple_eyes shinmai_maou_no_testament silver_hair small_breasts smile solo striped striped_legwear tail thigh_strap thighhighs twintails two_side_up underboob underwear](/cdn_image/preview/43/49/4349e202ae76ed1d17a194c4efec2f13.jpg)
The Testament of Sister New Devil (新妹魔王の契約者『テスタメント』), also known as Shinmai Maou no Keiyakusha, is a Light Novel written by Uesu Tetsuto and illustrated by Ōkuma Nekosuke (Nitro+) released since September 2012.
It has 2 manga adaptations and an anime adaptation.