The Testament of Sister New Devil

The Testament of Sister New Devil

First light novel volume cover
新妹魔王の契約者 (テスタメント)
(Shinmai Maō no Tesutamento)
Genre Action, Fantasy, Harem
Light novel
Written by Tetsuto Uesu
Illustrated by Nekosuke Ōkuma
Published by Kadokawa Shoten
Demographic Male
Imprint Kadokawa Sneaker Bunko
Original run September 29, 2012 – present
Volumes 9
Written by Tetsuto Uesu
Illustrated by Kashiwa Miyako
Published by Kadokawa Shoten
English publisher
Demographic Shōnen
Magazine Shōnen Ace
Original run May 25, 2013 – present
Volumes 7
Shinmai Maō no Testament: Arashi!
Written by Tetsuto Uesu
Illustrated by Fumihiro Kiso
Published by Hakusensha
Demographic Seinen
Magazine Young Animal Arashi
Original run January 7, 2014May 6, 2016
Volumes 5
Anime television series
Directed by Hisashi Saito
Produced by Kuraken Chiaki
Written by Takao Yoshioka
Music by Yasuharu Takanashi
Studio Production IMS
Licensed by
Network Tokyo MX, SUN, AT-X, GBS, MTV, BS11, TVS, CTC, tvk, TVQ
Original run January 7, 2015 March 25, 2015
Episodes 12
Original video animation
Directed by Hisashi Saito
Studio Production IMS
Licensed by
Released June 22, 2015
Runtime 25 minutes
Anime television series
The Testament of Sister New Devil BURST
Directed by Hisashi Saito
Produced by Kuraken Chiaki
Written by Sumio Uetake
Music by Yasuharu Takanashi
Studio Production IMS
Licensed by
Network Tokyo MX, AT-X, BS11, CTC, tvk, TVS, SUN, GBS, MTV, TVQ
Original run October 9, 2015 December 11, 2015
Episodes 10
Original video animation
Directed by Hisashi Saito
Studio Production IMS
Licensed by
Released January 26, 2016
Runtime 25 minutes

The Testament of Sister New Devil (Japanese: 新妹魔王の契約者 (テスタメント) Hepburn: Shinmai Maō no Tesutamento) is a Japanese light novel series written by Tetsuto Uesu and illustrated by Nekosuke Ōkuma. Nine volumes have been published by Kadokawa Shoten since 2012 under their Kadokawa Sneaker Bunko imprint. A manga adaptation has been serialized in Kadokawa Shoten's Shōnen Ace magazine since May 2013. A second manga adaptation has been serialized in Hakusensha's Young Animal Arashi magazine since February 2014. An anime adaptation started airing in January 2015.[1][2] After it concluded in March, a 13th OVA episode came out in June. A second season premiered in October 2015 with a second OVA to follow in January 2016.[3]


Basara Tōjō is a high school student studying at Hijirigasaka Academy when his father Jin suddenly gets "remarried" and asks Basara if he wants to have sisters. Basara meets his two cute stepsisters, Mio Naruse and Maria Naruse. After his father departs overseas, Basara quickly finds that the two sisters are actually part of a demon clan, and he is meant to be with the hero clan. Mio, a Demon princess, forcibly attempts to make a master and servant contract with Basara, but Maria has it end up being the opposite. Basara is then always getting into ecchi scenarios, more the while, to protect Mio from being pursued by other demons who are after her heritage passed down by the former Demon Lord Wilbert.


Basara Tōjō (東城 刃更 Tōjō Basara)
Voiced by: Yūichi Nakamura[4]
Basara Tojo is a Year 1 high school student at Hijirigasaka Academy and the protagonist of the story. As a member of a hero clan, he grows up in a hidden rural village. Basara wields the formerly cursed sword Brynhildr. Basara is the only son of Jin Tōjō, formerly acknowledged to be the 'Strongest Hero' in the village. As Jin's son, great things are expected of Basara and he is unusually strong even as a youth. Basara possesses the skill 'Banishing Shift', which nullifies any skill directed against him. Five years earlier, when Jin is on a trip, the seal of the S-Ranked 'Evil Spirit' is broken. Many people, including his friends and family, are killed by the spirit. When he sees the Evil Spirit trying to harm his childhood friend, Yuki, his Banishing Shift goes out of control, causing a great crater to form, obliterating the bodies of those slain except Yuki, and also cleansing the area of the evil spirit. Yuki is spared and the cursed sword Brynhildr is cleansed. Because of this, he is confined in the village and when Basara's father returns he insists that Basara be released. Basara is released, but only on the condition that Jin lose his title as a hero. Jin chooses the release of his son and they move to the city.
In the present, Basara's father tells him that he is remarrying and that Basara is going to have two younger step-sisters, Mio and Maria. The four of them move into a new house (since the girls' mother is away overseas) and Jin is soon called away on business. The girls take advantage and try to force Basara to leave the house using magic. However, this backfires and Basara tells them to leave. He then contacts his father who reveals the girls' true nature to Basara and why he took them in. Having decided to protect them as their older brother, and in spite of their deception, Basara goes after the girls and saves Mio's life.
Maria has Basara and Mio perform a master-slave magical contract that allows them to know each other's location. But, Maria unexpectedly makes Basara the master and Mio the slave, not the other way around and because Maria used Succubus magic to form the contract, the penalty for a disloyal servant is a strong aphrodisiac effect that can only be relieved by the touch of the master, leading to a strong orgasmic release. He has also entered a pact with Yuki in order to boost their fighting strength.
Mio Naruse (成瀬 澪 Naruse Mio)
Voiced by: Ayaka Asai[4]
Mio, the main female protagonist and titular character, is a Demon princess and heir of the former Demon Lord, Wilbert, as well as niece to the current Moderate Faction leader, Ramsus. She grows up in the care of some of Wilbert's followers ignorant of her heritage. Mio becomes aware of her heritage and inherits her true father's abilities after his death only six months before meeting the Tōjō family. She and Maria are hiding from the current Demon Lord Leoheart's minions who want to kill her for the powers that she inherited. This is the reason why Jin Tōjō takes Mio and her succubus retainer, Maria, in to protect them and prevent the current Demon Lord from becoming stronger. Mio is not pleased with the results of Maria's bonding spell, but she eventually develops feelings for Basara. However, whenever he walks in on her naked, accidentally, she constantly says she will kill him a hundred times, with her usually hitting him with her magic. When she needs to be submitted due to the aphrodisiac effects of the pact, her most sensitive area is her breasts.
Maria Naruse (成瀬 万理亜 Naruse Maria)
Voiced by: Kaori Fukuhara
Maria is a succubus and is Mio's follower and guardian. Maria loves Mio like a sister and is willing to give her own life to protect her. However, true to her succubus nature, Maria likes to tease and trick Basara whenever she can, but she genuinely likes him and considers him to be her older brother, although she seems to enjoy getting him in perverted situations, all that leave him uncomfortable, as she is also responsible for Basara's and Mio's alone moments, involving the two in uncomfortable positions or moments, that may get both naked. Her tricks often gets her in trouble and results in Mio punishing her. It is later revealed that she has a much more adult form that is an extreme opposite of her loli form, being an incredibly seductive adult.
Yuki Nonaka (野中 柚希 Nonaka Yūki)
Voiced by: Sarah Emi Bridcutt
Yuki is a member of the Hero Tribe and Basara Tōjō's childhood friend who speaks in the Kansai dialect. A rather calm and serious person who only shows her more affectionate side to Basara as she has had a crush on him since they were children. She is one of the observers watching Mio Naruse and is the Class Representative of Basara and Mio's class in Hijirigasaka Academy. Unlike nearly all of the other people in the Hero Tribe, she does not resent Basara regarding the incident five years ago. She holds Basara as the most important thing in her life despite stating that she is look out for everyone else because she knows that his people have turned on him, not the other way around. Yuki is the sister of Kurumi Nonaka and wields the Spirit Sword, Sakuya. She is the second person to make a Master-Servant contract with Basara (something she agreed to with no hesitation) and even formed in the same manner as Mio where the aphrodisiac effects took effect and she needed to be submitted (if anything she almost tries to disobey Basara so that she has to submit). It is seen and confirmed by Maria that Yuki's most sensitive spot is her buttocks.
Kurumi Nonaka (野中 胡桃 Nonaka Kurumi)
Voiced by: Iori Nomizu
Yuki's younger sister and also a member of the Hero Tribe. Kurumi has a hostile attitude towards Basara, but after being saved by Basara during their fight she realizes what Yuki knew all along and he continues to blame himself for not being able to control his ability which causes the accident 5 years before Mio meets Basara and develops a crush on him as well. She specializes in summoning spirits. Kurumi's most sensitive spot is her underarms. She later joins Basara's group as the fourth female.
Jin Tōjō (東城 迅 Tōjō Jin)
Voiced by: Keiji Fujiwara
Jin is Basara's father and a member of the Hero Tribe. He knows of and sympathizes with Mio's situation and that is why he decides to protect her. As a foreign correspondent Jin is largely absent from the Tōjō home. His strength is so famous that it kept the Demon Lord Wilbert at bay.
Yahiro Takigawa (Lars) (滝川 八尋 (ラース) Takigawa Yahiro (Rāsu))
Voiced by: Tomokazu Sugita
A masked Demon sent to spy on Mio who disguises himself as her and Basara's classmate, but after being defeated and nearly killed, he befriends Basara and they form an uneasy alliance. He's capable of creating dolls to take his place and fights using barriers. Mio's foster parents were his caretakers in the orphanage he grew up in, so he agreed to help Basara on the condition he could kill Zolgia himself, to fulfill his wish and avenge his caretaker.
Takashi Hayase (早瀬 高志 Hayase Takashi)
Voiced by: Go Inoue
A member of the Hero Tribe who wields the cursed spear, Byakko. He is Basara's childhood friend, but resents him after the incident 5 years before Basara meets Mio and believes that not only Basara has forgotten the incident, but any who side with a demon needs to be killed.
Chisato Hasegawa (長谷川 千里 Hasegawa Chisato)
Voiced by: Yuu Asakawa
The school nurse at Hijiriga Saka Academy. She is aware of the supernatural things happening around the students and tends to give Basara advice. A wise and caring person, it is revealed that she was Basara's mother's best friend and close enough to be sisters in all but blood. After Basara's mother dies, Hasegawa dedicates her life to protecting Basara. It is also revealed is that she is not human but in fact an Angel, hinting that Basara's mother was one as well therefore making him a Nephilim. She sometimes takes the initiative in trying to seduce Basara.
Zest (ゼスト Zesuto)
Voiced by: Seiko Yoshida
Another demon, made by Zolgia to be his right-hand, sent to keep an eye on Mio alongside Lars, and is originally envious of the pacts that Basara has with Maria, Mio and Yuki, since they care for each other.
She later joins Basara's group as the fifth female and third demon girl following Zolgia's defeat and her defection to the Moderate faction. After spending time with Maria's mother, Sheera, Basara discovers that her bust had become considerably larger. She and Basara are convinced by Sheera to make a third Master-Servant pact, to not only increase their strength but also to protect Zest who would be in danger should the tension between the demon factions increase. Although Zest was able make a proper Master-Servant pact with Basara, unlike Mio and Yuki, the aphrodisiac effects of the curse still activate due to Zest's own doubts of her worthiness of being Basara's servant. Contrast to her serious nature in battle she is actually meek and timid outside, she would sometimes dress as a maid for Basara and adds "-sama" honorific to his name.
Kyōichi Shiba (芝恭一 Shiba Kyōichi)
Voiced by: Daisuke Hirakawa
A member of the Hero Tribe who is released from prison to accompany Takashi and Kurumi as a spectator. While very powerful, he respects Basara's ability and desire to protect Mio, Maria, and Yuki. Basara states that he is so powerful that if he is a genius then Shiba is over-talented.
Zolgia (ゾルギア Zorugia)
Voiced by: Hiroto Kazuki
The Demon who kills Mio's adoptive parents and Zest's former master, who plans to turn non Leohart and obtain the Demon King's powers for himself by kidnapping Mio without Leohart's knowledge. After he is defeated, Lars captures and kills him.
Leohart (レオハート Reohāto)
Voiced by: Kazuyuki Okitsu
The current Demon Lord and younger brother of the demon Riara.
Mamoru Sakasaki / Ornis (坂崎 守 / オルニス Sakazaki Mamoru / Orunisu)
Voiced by: Kenjiro Tsuda
A teacher at Hijirigasaka Academy. Initially assumed to be a human, it is revealed that he is actually a god like Hasegawa. He is intent on killing Basara who he believes reached beyond his stature and earned Hasegawa's affection. He is believes that killing him will bring Hasegawa back to heaven. He tries to use Kurumi as hostage to prevent Basara from attacking and then succeeds in cutting off Basara's sword arm. However this causes the sword to react and release the spirit of Brynhildr, One of the most powerful Valkyries. In this form Basara's arm grows back, his hair on the right-side of his head turns white with a greenish tinge and his right eye glows. He moves so fast that Sakasaki cannot even see him and he cuts of the top of his foot using Banishing Shift which he could earlier only use as a counter, not as an attack. Basara attempts to kill Sakasaki but Hasegawa intervenes. She then revels that she always knew that Ornis has replaced the real Sakasaki. Using her full power, Hasegawa kills Ornis has Basara take the credit for killing the god.


Light novels

The first light novel volume was published on September 29, 2012, under Kadokawa Shoten's Kadokawa Sneaker Bunko imprint. Nine volumes have been published as of November 2015.

No.Release date ISBN
1 September 29, 2012[5]ISBN 978-4-04-100495-1
2 January 31, 2013[6]ISBN 978-4-04-100670-2
3 June 1, 2013[7]ISBN 978-4-04-100860-7
4 November 1, 2013[8]ISBN 978-4-04-101061-7
5 April 1, 2014[9]ISBN 978-4-04-101297-0
6 September 1, 2014[10]ISBN 978-4-04-101433-2
7 January 1, 2015[11]ISBN 978-4-04-102268-9
8 July 1, 2015[12]ISBN 978-4-04-102576-5
9 December 1, 2015[13]ISBN 978-4-04-103747-8


A manga adaptation with art by Kashiwa Miyako began serialization in Kadokawa Shoten's shōnen manga magazine Shōnen Ace in the July 2013 issue, released on May 25, 2013.[14] The series has been licensed for publication in North America by Seven Seas Entertainment.[15] A second manga adaptation, titled Shinmai Maō no Testament: Arashi! (新妹魔王の契約者・嵐!), focusing on the antics of Maria with art by Fumihiro Kiso, began serialization in Hakusensha's seinen manga magazine Young Animal Arashi on February 7, 2014.[16]


An anime adaptation premiered on January 7, 2015.[2] The opening theme is "Blade of Hope" by sweet ARMS and the ending theme is "Still Sis" by Kaori Sadohara.[17] A second season titled The Testament of Sister New Devil BURST started on October 9, 2015. The anime is licensed in North America by Crunchyroll, with Funimation handling the home video release.[18]

See also


  1. "The Testament of Sister New Devil Light Novels Get Anime". Anime News Network. March 19, 2014. Retrieved March 19, 2014.
  2. 1 2 "The Testament of Sister New Devil Anime's 1st Promo Previews Opening Theme". Anime News Network. October 10, 2014. Retrieved December 13, 2014.
  3. "The Testament of Sister New Devil Gets 2nd Season, New Original Anime BD". Anime News Network. March 19, 2015. Retrieved March 19, 2015.
  4. 1 2 "Staff & Cast" (in Japanese). Retrieved February 3, 2015.
  5. "新妹魔王の契約者I" (in Japanese). Kadokawa Shoten. Retrieved April 19, 2014.
  6. "新妹魔王の契約者II" (in Japanese). Kadokawa Shoten. Retrieved April 19, 2014.
  7. "新妹魔王の契約者III" (in Japanese). Kadokawa Shoten. Retrieved April 19, 2014.
  8. "新妹魔王の契約者IV" (in Japanese). Kadokawa Shoten. Retrieved April 19, 2014.
  9. "新妹魔王の契約者V" (in Japanese). Kadokawa Shoten. Retrieved April 19, 2014.
  10. "新妹魔王の契約者VI" (in Japanese). Kadokawa Shoten. Retrieved April 19, 2014.
  11. "新妹魔王の契約者VII" (in Japanese). Kadokawa Shoten. Retrieved April 19, 2014.
  12. "新妹魔王の契約者VIII" (in Japanese). Kadokawa Shoten. Retrieved April 19, 2014.
  13. "新妹魔王の契約者IX" (in Japanese). Kadokawa Shoten. Retrieved May 1, 2016.
  14. "「Fate/hollow ataraxia」少年エースで雌鳥がコミカライズ" (in Japanese). May 26, 2013. Retrieved March 19, 2014.
  15. "Seven Seas Adds The Testament of Sister New Devil, My Monster Secret Manga". Anime News Network. February 25, 2015. Retrieved May 11, 2016.
  16. 「新妹魔王の契約者」木曽フミヒロがアニマル嵐でマンガ化 (in Japanese). February 7, 2014. Retrieved March 19, 2014.
  17. "Iori Nomizu, Seiko Yoshida, Others Join The Testament of Sister New Devil Anime Cast". Anime News Network. November 22, 2014. Retrieved December 13, 2014.
  18. "Crunchyroll and Funimation Partner to Expand access to Anime". Crunchyroll. September 8, 2016. Retrieved September 8, 2016.
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